# HG changeset patch
# User jwe
# Date 857185957 0
# Node ID ee9582e6668f29213d70bf539e766c4b32eac876
# Parent  c05ed7ef4c1a510d6ccbae2199eed20d53183119
[project @ 1997-03-01 03:12:36 by jwe]

diff --git a/doc/interpreter/arith.texi b/doc/interpreter/arith.texi
--- a/doc/interpreter/arith.texi
+++ b/doc/interpreter/arith.texi
@@ -416,7 +416,7 @@
 @section Special Functions
 
 @deftypefn {Mapping Function} {} beta (@var{a}, @var{b})
-Returns the Beta function,
+Return the Beta function,
 @iftex
 @tex
 $$
@@ -433,7 +433,7 @@
 @end deftypefn
 
 @deftypefn {Mapping Function} {} betai (@var{a}, @var{b}, @var{x})
-Returns the incomplete Beta function,
+Return the incomplete Beta function,
 @iftex
 @tex
 $$
@@ -458,7 +458,7 @@
 @end deftypefn
 
 @deftypefn {Mapping Function} {} bincoeff (@var{n}, @var{k})
-Returns the binomial coefficient of @var{n} and @var{k}, defined as
+Return the binomial coefficient of @var{n} and @var{k}, defined as
 @iftex
 @tex
 $$
@@ -576,7 +576,7 @@
 
 @deftypefn {Mapping Function} {} lgamma (@var{a}, @var{x})
 @deftypefnx {Mapping Function} {} gammaln (@var{a}, @var{x})
-Returns the natural logarithm of the gamma function.
+Return the natural logarithm of the gamma function.
 @end deftypefn
 
 @deftypefn {Function File} {} cross (@var{x}, @var{y})
@@ -592,7 +592,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} commutation_matrix (@var{m}, @var{n})
-Returns the commutation matrix
+Return the commutation matrix
 @iftex
 @tex
  $K_{m,n}$
@@ -654,7 +654,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} duplication_matrix (@var{n})
-Returns the duplication matrix
+Return the duplication matrix
 @iftex
 @tex
  $D_n$
diff --git a/doc/interpreter/io.texi b/doc/interpreter/io.texi
--- a/doc/interpreter/io.texi
+++ b/doc/interpreter/io.texi
@@ -1443,14 +1443,14 @@
 @subsection End of File and Errors
 
 @deftypefn {Built-in Function} {} feof (@var{fid})
-Returns 1 if an end-of-file condition has been encountered for a given
+Return 1 if an end-of-file condition has been encountered for a given
 file and 0 otherwise.  Note that it will only return 1 if the end of the
 file has already been encountered, not if the next read operation will
 result in an end-of-file condition.
 @end deftypefn
 
 @deftypefn {Built-in Function} {} ferror (@var{fid})
-Returns 1 if an error condition has been encountered for a given file
+Return 1 if an error condition has been encountered for a given file
 and 0 otherwise.  Note that it will only return 1 if an error has
 already been encountered, not if the next operation will result in an
 error condition.
diff --git a/doc/interpreter/linalg.texi b/doc/interpreter/linalg.texi
--- a/doc/interpreter/linalg.texi
+++ b/doc/interpreter/linalg.texi
@@ -154,7 +154,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} null (@var{a}, @var{tol})
-Returns an orthonormal basis of the null space of @var{a}.
+Return an orthonormal basis of the null space of @var{a}.
 
 The dimension of the null space is taken as the number of singular
 values of @var{a} not greater than @var{tol}.  If the argument @var{tol}
@@ -166,7 +166,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} orth (@var{a}, @var{tol})
-Returns an orthonormal basis of the range space of @var{a}.
+Return an orthonormal basis of the range space of @var{a}.
 
 The dimension of the range space is taken as the number of singular
 values of @var{a} greater than @var{tol}.  If the argument @var{tol} is
@@ -178,7 +178,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} pinv (@var{x}, @var{tol})
-Returns the pseudoinverse of @var{x}.  Singular values less than
+Return the pseudoinverse of @var{x}.  Singular values less than
 @var{tol} are ignored. 
 
 If the second argument is omitted, it is assumed that
@@ -671,8 +671,8 @@
 @section Functions of a Matrix
 
 @deftypefn {Loadable Function} {} expm (@var{a})
-Returns the exponential of a matrix, defined as the
-infinite Taylor series
+Return the exponential of a matrix, defined as the infinite Taylor
+series
 @iftex
 @tex
 $$
diff --git a/doc/interpreter/matrix.texi b/doc/interpreter/matrix.texi
--- a/doc/interpreter/matrix.texi
+++ b/doc/interpreter/matrix.texi
@@ -161,10 +161,10 @@
 @end deftypefn
 
 @deftypefn {Loadable Function} {} find (@var{x})
-The function @code{find} returns a vector of indices of nonzero elements
-of a matrix.  To obtain a single index for each matrix element, Octave
-pretends that the columns of a matrix form one long vector (like Fortran
-arrays are stored).  For example,
+Return a vector of indices of nonzero elements of a matrix.  To obtain a
+single index for each matrix element, Octave pretends that the columns
+of a matrix form one long vector (like Fortran arrays are stored).  For
+example,
 
 @example
 @group
@@ -235,7 +235,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} rot90 (@var{x}, @var{n})
-Returns a copy of @var{x} with the elements rotated counterclockwise in
+Return a copy of @var{x} with the elements rotated counterclockwise in
 90-degree increments.  The second argument is optional, and specifies
 how many 90-degree rotations are to be applied (the default value is 1).
 Negative values of @var{n} rotate the matrix in a clockwise direction.
@@ -306,7 +306,7 @@
 @end deftypefn
 
 @deftypefn {Loadable Function} {[@var{s}, @var{i}] =} sort (@var{x})
-Returns a copy of @var{x} with the elements elements arranged in
+Return a copy of @var{x} with the elements elements arranged in
 increasing order.  For matrices, @code{sort} orders the elements in each
 column.
 
@@ -409,14 +409,14 @@
 @end deftypefn
 
 @deftypefn {Function File} {} vec (@var{x})
-For a matrix @var{x}, returns the vector obtained by stacking the
-columns of @var{x} one above the other.
+Return the vector obtained by stacking the columns of the matrix @var{x}
+one above the other.
 @end deftypefn
 
 @deftypefn {Function File} {} vech (@var{x})
-For a square matrix @var{x}, returns the vector obtained from @var{x}
-by eliminating all supradiagonal elements and stacking the result
-one column above the other.
+Return the vector obtained by eliminating all supradiagonal elements of
+the square matrix @var{x} and stacking the result one column above the
+other.
 @end deftypefn
 
 @node Special Utility Matrices, Famous Matrices, Rearranging Matrices, Matrix Manipulation
@@ -424,7 +424,7 @@
 
 @deftypefn {Built-in Function} {} eye (@var{x})
 @deftypefnx {Built-in Function} {} eye (@var{n}, @var{m})
-Returns an identity matrix.  If invoked with a single scalar argument,
+Return an identity matrix.  If invoked with a single scalar argument,
 @code{eye} returns a square matrix with the dimension specified.  If you
 supply two scalar arguments, @code{eye} takes them to be the number of
 rows and columns.  If given a vector with two elements, @code{eye} uses
@@ -459,7 +459,7 @@
 
 @deftypefn {Built-in Function} {} ones (@var{x})
 @deftypefnx {Built-in Function} {} ones (@var{n}, @var{m})
-Returns a matrix whose elements are all 1.  The arguments are handled
+Return a matrix whose elements are all 1.  The arguments are handled
 the same as the arguments for @code{eye}.
 
 If you need to create a matrix whose values are all the same, you should
@@ -472,14 +472,14 @@
 
 @deftypefn {Built-in Function} {} zeros (@var{x})
 @deftypefnx {Built-in Function} {} zeros (@var{n}, @var{m})
-Returns a matrix whose elements are all 0.  The arguments are handled
+Return a matrix whose elements are all 0.  The arguments are handled
 the same as the arguments for @code{eye}.
 @end deftypefn
 
 @deftypefn {Loadable Function} {} rand (@var{x})
 @deftypefnx {Loadable Function} {} rand (@var{n}, @var{m})
 @deftypefnx {Loadable Function} {} rand (@code{"seed"}, @var{x})
-Returns a matrix with random elements uniformly distributed on the
+Return a matrix with random elements uniformly distributed on the
 interval (0, 1).  The arguments are handled the same as the arguments
 for @code{eye}.  In
 addition, you can set the seed for the random number generator using the
@@ -503,7 +503,7 @@
 @deftypefn {Loadable Function} {} randn (@var{x})
 @deftypefnx {Loadable Function} {} randn (@var{n}, @var{m})
 @deftypefnx {Loadable Function} {} randn (@code{"seed"}, @var{x})
-Returns a matrix with normally distributed random elements.  The
+Return a matrix with normally distributed random elements.  The
 arguments are handled the same as the arguments for @code{eye}.  In
 addition, you can set the seed for the random number generator using the
 form
@@ -570,7 +570,7 @@
 Houston, TX 77030.
 
 @deftypefn {Built-in Function} {} diag (@var{v}, @var{k})
-Returns a diagonal matrix with vector @var{v} on diagonal @var{k}.  The
+Return a diagonal matrix with vector @var{v} on diagonal @var{k}.  The
 second argument is optional.  If it is positive, the vector is placed on
 the @var{k}-th super-diagonal.  If it is negative, it is placed on the
 @var{-k}-th sub-diagonal.  The default value of @var{k} is 0, and the
diff --git a/doc/interpreter/poly.texi b/doc/interpreter/poly.texi
--- a/doc/interpreter/poly.texi
+++ b/doc/interpreter/poly.texi
@@ -101,12 +101,12 @@
 @end deftypefn
 
 @deftypefn {Function File} {} polyderiv (@var{c})
-Returns the coefficients of the derivative of the polynomial whose
+Return the coefficients of the derivative of the polynomial whose
 coefficients are given by vector @var{c}.
 @end deftypefn
 
 @deftypefn {Function File} {} polyfit (@var{n}, @var{y}, @var{n})
-Returns the coefficients of a polynomial @var{p}(@var{x}) of degree
+Return the coefficients of a polynomial @var{p}(@var{x}) of degree
 @var{n} that minimizes 
 @iftex
 @tex
@@ -122,7 +122,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} polyinteg (@var{c})
-Returns the coefficients of the integral the polynomial whose coefficients
+Return the coefficients of the integral the polynomial whose coefficients
 are represented by the vector @var{c}.
 
 The constant of integration is set to zero.
diff --git a/doc/interpreter/set.texi b/doc/interpreter/set.texi
--- a/doc/interpreter/set.texi
+++ b/doc/interpreter/set.texi
@@ -9,9 +9,8 @@
 set is defined as a collection unique elements.
 
 @deftypefn {Function File} {} create_set (@var{x})
-Given a matrix or vector of values, the function @code{create_set}
-returns a row vector containing unique values, sorted in ascending
-order.  For example,
+Return a row vector containing the unique values in @var{x}, sorted in
+ascending order.  For example,
 
 @example
 @group
@@ -46,7 +45,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} complement (@var{x}, @var{y})
-Returns the elements of set @var{y} that are not in set @var{x}.  For
+Return the elements of set @var{y} that are not in set @var{x}.  For
 example,
 
 @example
diff --git a/doc/interpreter/signal.texi b/doc/interpreter/signal.texi
--- a/doc/interpreter/signal.texi
+++ b/doc/interpreter/signal.texi
@@ -62,11 +62,10 @@
 @end deftypefn
 
 @deftypefn {Built-in Function} {} fftconv (@var{a}, @var{b}, @var{n})
-This function returns the convolution of the vectors @var{a} and
-@var{b}, a vector with length equal to the @code{length (a) + length (b)
-- 1}.  If @var{a} and @var{b} are the coefficient vectors of two
-polynomials, the returned value is the coefficient vector of the product
-polynomial.
+Return the convolution of the vectors @var{a} and @var{b}, as a vector
+with length equal to the @code{length (a) + length (b) - 1}.  If @var{a}
+and @var{b} are the coefficient vectors of two polynomials, the returned
+value is the coefficient vector of the product polynomial.
 
 The computation uses the FFT by calling the function @code{fftfilt}.  If
 the optional argument @var{n} is specified, an N-point FFT is used.
@@ -82,8 +81,8 @@
 @end deftypefn
 
 @deftypefn {Loadable Function} {y =} filter (@var{b}, @var{a}, @var{x})
-This function returns the solution to the following linear,
-time-invariant difference equation:
+Return the solution to the following linear, time-invariant difference
+equation:
 @iftex
 @tex
 $$
diff --git a/doc/interpreter/special.texi b/doc/interpreter/special.texi
--- a/doc/interpreter/special.texi
+++ b/doc/interpreter/special.texi
@@ -19,7 +19,7 @@
 
 @deftypefn {Built-in Function} {} eye (@var{x})
 @deftypefnx {Built-in Function} {} eye (@var{n}, @var{m})
-Returns an identity matrix.  If invoked with a single scalar argument,
+Return an identity matrix.  If invoked with a single scalar argument,
 @code{eye} returns a square matrix with the dimension specified.  If you
 supply two scalar arguments, @code{eye} takes them to be the number of
 rows and columns.  If given a vector with two elements, @code{eye} uses
@@ -54,7 +54,7 @@
 
 @deftypefn {Built-in Function} {} ones (@var{x})
 @deftypefnx {Built-in Function} {} ones (@var{n}, @var{m})
-Returns a matrix whose elements are all 1.  The arguments are handled
+Return a matrix whose elements are all 1.  The arguments are handled
 the same as the arguments for @code{eye}.
 
 If you need to create a matrix whose values are all the same, you should
@@ -67,14 +67,14 @@
 
 @deftypefn {Built-in Function} {} zeros (@var{x})
 @deftypefnx {Built-in Function} {} zeros (@var{n}, @var{m})
-Returns a matrix whose elements are all 0.  The arguments are handled
+Return a matrix whose elements are all 0.  The arguments are handled
 the same as the arguments for @code{eye}.
 @end deftypefn
 
 @deftypefn {Loadable Function} {} rand (@var{x})
 @deftypefnx {Loadable Function} {} rand (@var{n}, @var{m})
 @deftypefnx {Loadable Function} {} rand (@code{"seed"}, @var{x})
-Returns a matrix with random elements uniformly distributed on the
+Return a matrix with random elements uniformly distributed on the
 interval (0, 1).  The arguments are handled the same as the arguments
 for @code{eye}.  In
 addition, you can set the seed for the random number generator using the
@@ -98,7 +98,7 @@
 @deftypefn {Loadable Function} {} randn (@var{x})
 @deftypefnx {Loadable Function} {} randn (@var{n}, @var{m})
 @deftypefnx {Loadable Function} {} randn (@code{"seed"}, @var{x})
-Returns a matrix with normally distributed random elements.  The
+Return a matrix with normally distributed random elements.  The
 arguments are handled the same as the arguments for @code{eye}.  In
 addition, you can set the seed for the random number generator using the
 form
@@ -164,7 +164,7 @@
 The University of Texas, M.D. Anderson Cancer Center, Houston, TX 77030.
 
 @deftypefn {Built-in Function} {} diag (@var{v}, @var{k})
-Returns a diagonal matrix with vector @var{v} on diagonal @var{k}.  The
+Return a diagonal matrix with vector @var{v} on diagonal @var{k}.  The
 second argument is optional.  If it is positive, the vector is placed on
 the @var{k}-th super-diagonal.  If it is negative, it is placed on the
 @var{-k}-th sub-diagonal.  The default value of @var{k} is 0, and the
diff --git a/doc/interpreter/stats.texi b/doc/interpreter/stats.texi
--- a/doc/interpreter/stats.texi
+++ b/doc/interpreter/stats.texi
@@ -112,9 +112,10 @@
 @end deftypefn
 
 @deftypefn {Function File} {} mahalanobis (@var{x}, @var{y})
-Returns Mahalanobis' D-square distance between the multivariate samples
-@var{x} and @var{y}, which must have the same number of components
-(columns), but may have a different number of observations (rows).
+Return the Mahalanobis' D-square distance between the multivariate
+samples @var{x} and @var{y}, which must have the same number of
+components (columns), but may have a different number of observations
+(rows).
 @end deftypefn
 
 @deftypefn {Function File} {} skewness (@var{x})
diff --git a/doc/interpreter/strings.texi b/doc/interpreter/strings.texi
--- a/doc/interpreter/strings.texi
+++ b/doc/interpreter/strings.texi
@@ -123,7 +123,7 @@
 @section Creating Strings
 
 @deftypefn {Function File} {} blanks (@var{n})
-Returns a string of @var{n} blanks.
+Return a string of @var{n} blanks.
 @end deftypefn
 
 @deftypefn {Function File} {} int2str (@var{n})
@@ -177,7 +177,7 @@
 @end defvr
 
 @deftypefn {Function File} {} str2mat (@var{s_1}, @dots{}, @var{s_n})
-Returns a matrix containing the strings @var{s_1}, @dots{}, @var{s_n} as
+Return a matrix containing the strings @var{s_1}, @dots{}, @var{s_n} as
 its rows.  Each string is padded with blanks in order to form a valid
 matrix.
 
@@ -199,7 +199,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} findstr (@var{s}, @var{t}, @var{overlap})
-Returns the vector of all positions in the longer of the two strings
+Return the vector of all positions in the longer of the two strings
 @var{s} and @var{t} where an occurrence of the shorter of the two starts.
 If the optional argument @var{overlap} is nonzero, the returned vector
 can include overlapping positions (this is the default).  For example,
@@ -213,7 +213,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} index (@var{s}, @var{t})
-Returns the position of the first occurrence of the string @var{t} in the
+Return the position of the first occurrence of the string @var{t} in the
 string @var{s}, or 0 if no occurrence is found.  For example,
 
 @example
@@ -225,7 +225,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} rindex (@var{s}, @var{t})
-Returns the position of the last occurrence of the string @var{t} in the
+Return the position of the last occurrence of the string @var{t} in the
 string @var{s}, or 0 if no occurrence is found.  For example,
 
 @example
@@ -268,7 +268,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} substr (@var{s}, @var{beg}, @var{len})
-Returns the substring of @var{s} which starts at character number
+Return the substring of @var{s} which starts at character number
 @var{beg} and is @var{len} characters long.  For example,
 
 @example
@@ -287,8 +287,8 @@
 @section String Conversions
 
 @deftypefn {Function File} {} bin2dec (@var{s})
-Given a binary number represented as a string of zeros and ones,
-returns the corresponding decimal number.  For example,
+Return a decimal number corresponding to the the binary number
+represented as a string of zeros and ones.  For example,
 
 @example
 bin2dec ("1110")
@@ -297,8 +297,8 @@
 @end deftypefn
 
 @deftypefn {Function File} {} dec2bin (@var{n})
-Given a nonnegative integer, returns the corresponding binary number as
-a string of ones and zeros.  For example, 
+Return a binary number corresponding the the nonnegative decimal number
+@var{n}, as a string of ones and zeros.  For example,
 
 @example
 dec2bin (14)
@@ -307,8 +307,8 @@
 @end deftypefn
 
 @deftypefn {Function File} {} dec2hex (@var{n})
-Given a nonnegative integer, returns the corresponding hexadecimal
-number as a string.  For example,
+Return the hexadecimal number corresponding to the nonnegative decimal
+number @var{n}, as a string.  For example,
 
 @example
 dec2hex (2748)
@@ -317,8 +317,8 @@
 @end deftypefn
 
 @deftypefn {Function File} {} hex2dec (@var{s})
-Given a hexadecimal number represented as a string, returns the
-corresponding decimal number.  For example,
+Return the decimal number corresponding to the hexadecimal number stored
+in the string @var{s}.  For example,
 
 @example
 hex2dec ("12B")
@@ -356,7 +356,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} toupper (@var{s})
-Returns a copy of the string @var{s}, with each  lower-case character
+Return a copy of the string @var{s}, with each  lower-case character
 replaced by the corresponding upper-case one; nonalphabetic characters
 are left unchanged.  For example,
 
@@ -418,52 +418,52 @@
 @end example
 
 @deftypefn {Mapping Function} {} isalnum (@var{s})
-Returns true for characters that are letters or digits (@code{isalpha
+Return 1 for characters that are letters or digits (@code{isalpha
 (@var{a})} or @code{isdigit (@var{})} is true).
 @end deftypefn
 
 @deftypefn {Mapping Function} {} isalpha (@var{s})
-Returns true for characters that are letters (@code{isupper (@var{a})}
+Return true for characters that are letters (@code{isupper (@var{a})}
 or @code{islower (@var{})} is true). 
 @end deftypefn
 
 @deftypefn {Mapping Function} {} isascii (@var{s})
-Returns true for characters that are ASCII (in the range 0 to 127 decimal).
+Return 1 for characters that are ASCII (in the range 0 to 127 decimal).
 @end deftypefn
 
 @deftypefn {Mapping Function} {} iscntrl (@var{s})
-Returns true for control characters.
+Return 1 for control characters.
 @end deftypefn
 
 @deftypefn {Mapping Function} {} isdigit (@var{s})
-Returns true for characters that are decimal digits.
+Return 1 for characters that are decimal digits.
 @end deftypefn
 
 @deftypefn {Mapping Function} {} isgraph (@var{s})
-Returns true for printable characters (but not the space character).
+Return 1 for printable characters (but not the space character).
 @end deftypefn
 
 @deftypefn {Mapping Function} {} islower (@var{s})
-Returns true for characters that are lower case letters.
+Return 1 for characters that are lower case letters.
 @end deftypefn
 
 @deftypefn {Mapping Function} {} isprint (@var{s})
-Returns true for printable characters (including the space character).
+Return 1 for printable characters (including the space character).
 @end deftypefn
 
 @deftypefn {Mapping Function} {} ispunct (@var{s})
-Returns true for punctuation characters.
+Return 1 for punctuation characters.
 @end deftypefn
 
 @deftypefn {Mapping Function} {} isspace (@var{s})
-Returns true for whitespace characters (space, formfeed, newline,
+Return 1 for whitespace characters (space, formfeed, newline,
 carriage return, tab, and vertical tab).
 @end deftypefn
 
 @deftypefn {Mapping Function} {} isupper (@var{s})
-Returns true for upper case letters.
+Return 1 for upper case letters.
 @end deftypefn
 
 @deftypefn {Mapping Function} {} isxdigit (@var{s})
-Returns true for characters that are hexadecimal digits.
+Return 1 for characters that are hexadecimal digits.
 @end deftypefn
diff --git a/doc/interpreter/struct.texi b/doc/interpreter/struct.texi
--- a/doc/interpreter/struct.texi
+++ b/doc/interpreter/struct.texi
@@ -185,17 +185,17 @@
 structures.
 
 @deftypefn {Built-in Function} {} is_struct (@var{expr})
-Returns 1 if the value of the expression @var{expr} is a structure.
+Return 1 if the value of the expression @var{expr} is a structure.
 @end deftypefn
 
 @deftypefn {Built-in Function} {} struct_contains (@var{expr}, @var{name})
-This function returns 1 if the expression @var{expr} is a structure and it
-includes an element named @var{name}.  The first argument must be a
-structure and the second must be a string.
+Return 1 if the expression @var{expr} is a structure and it includes an
+element named @var{name}.  The first argument must be a structure and
+the second must be a string.
 @end deftypefn
 
-@deftypefn {Built-in Function} {} struct_elements (@var{expr})
-If the expression @var{expr} is a structure, this function returns a
-list of strings naming the elements of the structure.  It is an error to
-call @code{struct_elements} with an argument that is not a structure.
+@deftypefn {Built-in Function} {} struct_elements (@var{struct})
+Return a list of strings naming the elements of the structure @{struct}.
+It is an error to call @code{struct_elements} with an argument that is
+not a structure.
 @end deftypefn
diff --git a/doc/interpreter/system.texi b/doc/interpreter/system.texi
--- a/doc/interpreter/system.texi
+++ b/doc/interpreter/system.texi
@@ -336,7 +336,7 @@
 @end deftypefn
 
 @deftypefn {Function File} {} date ()
-Returns the date as a character string in the form DD-MMM-YY.  For
+Return the date as a character string in the form DD-MMM-YY.  For
 example,
 
 @example
@@ -992,7 +992,7 @@
 @section Environment Variables
 
 @deftypefn {Built-in Function} {} getenv (@var{var})
-Returns the value of the environment variable @var{var}.  For example,
+Return the value of the environment variable @var{var}.  For example,
 
 @example
 getenv ("PATH")
@@ -1024,7 +1024,7 @@
 @end deffn
 
 @deftypefn {Built-in Function} {} pwd ()
-Returns the current working directory.
+Return the current working directory.
 @end deftypefn
 
 @defvr {Built-in Variable} PWD
@@ -1181,7 +1181,7 @@
 @end deftypefn
 
 @deftypefn {Built-in Function} {} version ()
-Returns Octave's version number as a string.  This is also the value of
+Return Octave's version number as a string.  This is also the value of
 the built-in variable @code{OCTAVE_VERSION}.
 @end deftypefn