doc: Periodic grammarcheck of documentation. * doc/interpreter/basics.txi, doc/interpreter/expr.txi, doc/interpreter/install.txi, doc/interpreter/java.txi, doc/interpreter/plot.txi, doc/interpreter/sparse.txi, doc/interpreter/vectorize.txi, libinterp/corefcn/cellfun.cc, libinterp/corefcn/debug.cc, libinterp/corefcn/file-io.cc, libinterp/corefcn/load-save.cc, libinterp/corefcn/matrix_type.cc, libinterp/corefcn/pr-output.cc, libinterp/parse-tree/oct-parse.in.yy, liboctave/numeric/LSODE-opts.in, scripts/image/imformats.m, scripts/image/imread.m, scripts/image/imwrite.m, scripts/miscellaneous/error_ids.m, scripts/miscellaneous/fileattrib.m, scripts/miscellaneous/mex.m, scripts/miscellaneous/mkoctfile.m, scripts/miscellaneous/warning_ids.m, scripts/prefs/prefdir.m, scripts/prefs/preferences.m, scripts/signal/fftfilt.m, scripts/strings/isstrprop.m, scripts/testfun/assert.m: Periodic grammarcheck of documentation.

--- a/scripts/image/imread.m	Sun Aug 04 11:57:26 2013 -0700
+++ b/scripts/image/imread.m	Sun Aug 04 13:08:39 2013 -0700
@@ -62,7 +62,7 @@
 ## in this way, its value can also be the string "all".
 ##
 ## @item "Info"
-## This option exists for @sc{Matlab} compatibility and has no effect.  For
+## This option exists for @sc{matlab} compatibility and has no effect.  For
 ## maximum performance while reading multiple images from a single file,
 ## use the Index option.
 ##