doc: Periodic grammarcheck of documentation. * doc/interpreter/basics.txi, doc/interpreter/container.txi, doc/interpreter/contrib.txi, doc/interpreter/diagperm.txi, doc/interpreter/errors.txi, doc/interpreter/install.txi, doc/interpreter/sparse.txi, libinterp/corefcn/ellipj.cc, libinterp/corefcn/mappers.cc, libinterp/corefcn/regexp.cc, libinterp/corefcn/tril.cc, libinterp/dldfcn/__init_fltk__.cc, libinterp/dldfcn/fftw.cc, libinterp/interpfcn/dirfns.cc, libinterp/interpfcn/input.cc, libinterp/octave-value/ov-fcn-inline.cc, libinterp/octave-value/ov-struct.cc, scripts/@ftp/cd.m, scripts/general/interp1.m, scripts/general/num2str.m, scripts/image/ind2rgb.m, scripts/image/rgb2ind.m, scripts/io/importdata.m, scripts/io/textread.m, scripts/java/javamem.m, scripts/linear-algebra/condest.m, scripts/linear-algebra/onenormest.m, scripts/miscellaneous/error_ids.m, scripts/miscellaneous/getfield.m, scripts/miscellaneous/setfield.m, scripts/plot/area.m, scripts/plot/pcolor.m, scripts/plot/stairs.m, scripts/set/powerset.m, scripts/sparse/bicg.m, scripts/sparse/bicgstab.m, scripts/sparse/cgs.m, scripts/specfun/ellipke.m, scripts/special-matrix/gallery.m, scripts/strings/strjoin.m, scripts/strings/strsplit.m, scripts/testfun/__have_feature__.m, scripts/testfun/__printf_assert__.m, scripts/testfun/__prog_output_assert__.m, scripts/testfun/__run_test_suite__.m: grammarcheck documentation.

--- a/scripts/plot/pcolor.m
+++ b/scripts/plot/pcolor.m
@@ -19,11 +19,12 @@
 ## -*- texinfo -*-
 ## @deftypefn  {Function File} {} pcolor (@var{x}, @var{y}, @var{c})
 ## @deftypefnx {Function File} {} pcolor (@var{c})
-## Produce a density plot for matrices @var{x} and @var{y} from @code{meshgrid},## and a matrix @var{c} corresponding to the @var{x} and @var{y} coordinates of
-## the mesh's vertices.  If @var{x} and @var{y} are vectors, then a typical
-## vertex is (@var{x}(j), @var{y}(i), @var{c}(i,j)).  Thus, columns of @var{c}
-## correspond to different @var{x} values and rows of @var{c} correspond
-## to different @var{y} values.
+## Produce a density plot for matrices @var{x} and @var{y} from
+## @code{meshgrid}, and a matrix @var{c} corresponding to the @var{x} and
+## @var{y} coordinates of the mesh's vertices.  If @var{x} and @var{y} are
+## vectors, then a typical vertex is (@var{x}(j), @var{y}(i), @var{c}(i,j)). 
+## Thus, columns of @var{c} correspond to different @var{x} values and rows
+## of @var{c} correspond to different @var{y} values.
 ##
 ## The @code{colormap} is scaled to the extents of @var{c}.
 ## Limits may be placed on the color axis by the command @code{caxis}, or by