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/doc/interpreter/sparse.txi	Sun Aug 04 11:57:26 2013 -0700
+++ b/doc/interpreter/sparse.txi	Sun Aug 04 13:08:39 2013 -0700
@@ -308,7 +308,7 @@
 The above problem of memory reallocation can be avoided in
 oct-files.  However, the construction of a sparse matrix from an oct-file
 is more complex than can be discussed here.  @xref{External Code Interface},
-for a a full description of the techniques involved.
+for a full description of the techniques involved.
 
 @node Information
 @subsection Finding Information about Sparse Matrices