doc: Periodic grammarcheck and spellcheck of documentation. * func.txi: Correct two misspellings * cumtrapz.m, dblquad.m, quadgk.m, quadl.m, quadv.m, trapz.m, triplequad.m, cond.m, gmres.m, bzip2.m, compare_versions.m, getappdata.m, unpack.m, ver.m, glpk.m, pkg.m, axis.m, uigetdir.m, uigetfile.m, view.m, prctile.m, quantile.m, unidcdf.m, unidinv.m, isstrprop.m, balance.cc, besselj.cc, cellfun.cc, colamd.cc, dot.cc, eigs.cc, fftw.cc, matrix_type.cc, pinv.cc, qr.cc, quad.cc, quadcc.cc, qz.cc, regexp.cc, schur.cc, time.cc (gmtime), typecast.cc urlwrite.cc bitfcns.cc (bitshift), data.cc (rem, norm, merge) debug.cc (dbstatus), dirfns.cc (glob), file-io.cc (freport), load-path.cc (genpath), load-save.cc (save), mappers.cc (islower, isupper, tolower, toupper) oct-hist.cc (edit_history), ov-fcn-inline.cc (vectorize), ov.cc (subsref), syscalls.cc (stat), variables.cc (whos, clear): Improve docstrings. Removed trailing whitespace characters on line.

--- a/src/DLD-FUNCTIONS/qz.cc
+++ b/src/DLD-FUNCTIONS/qz.cc
@@ -307,7 +307,7 @@
 \n\
 @item @code{[AA, BB, Q, Z, V, W, @var{lambda}] = qz (@var{A}, @var{B})}\n\
 \n\
-Computes QZ@tie{}decomposition, generalized eigenvectors, and \n\
+Computes QZ@tie{}decomposition, generalized eigenvectors, and\n\
 generalized eigenvalues of @math{(A - s B)}\n\
 @tex\n\
 $$ AV = BV{ \\rm diag }(\\lambda) $$\n\
@@ -343,13 +343,13 @@
 of the revised pencil contains all eigenvalues that satisfy:\n\
 @table @asis\n\
 @item \"N\"\n\
-= unordered (default) \n\
+= unordered (default)\n\
 \n\
 @item \"S\"\n\
-= small: leading block has all |lambda| @leq{} 1 \n\
+= small: leading block has all |lambda| @leq{} 1\n\
 \n\
 @item \"B\"\n\
-= big: leading block has all |lambda| @geq{} 1 \n\
+= big: leading block has all |lambda| @geq{} 1\n\
 \n\
 @item \"-\"\n\
 = negative real part: leading block has all eigenvalues\n\