doc: Shorten some long subsection names in Manual. Remove excess spaces from ends of @menu definitions. * doc/interpreter/arith.txi, doc/interpreter/basics.txi, doc/interpreter/bugs.txi, doc/interpreter/container.txi, doc/interpreter/data.txi, doc/interpreter/diagperm.txi, doc/interpreter/diffeq.txi, doc/interpreter/emacs.txi, doc/interpreter/expr.txi, doc/interpreter/external.txi, doc/interpreter/func.txi, doc/interpreter/grammar.txi, doc/interpreter/gui.txi, doc/interpreter/install.txi, doc/interpreter/intro.txi, doc/interpreter/io.txi, doc/interpreter/java.txi, doc/interpreter/linalg.txi, doc/interpreter/matrix.txi, doc/interpreter/nonlin.txi, doc/interpreter/numbers.txi, doc/interpreter/octave.texi, doc/interpreter/optim.txi, doc/interpreter/plot.txi, doc/interpreter/preface.txi, doc/interpreter/quad.txi, doc/interpreter/sparse.txi, doc/interpreter/stats.txi, doc/interpreter/stmt.txi, doc/interpreter/strings.txi, doc/interpreter/system.txi, doc/interpreter/var.txi: Shorten some long subsection names in Manual. Remove excess spaces from ends of @menu definitions.

--- a/doc/interpreter/java.txi
+++ b/doc/interpreter/java.txi
@@ -145,7 +145,7 @@
 * How to make Java classes available?::
 * How to create an instance of a Java class?::
 * How can I handle memory limitations?::
-* Which @TeX{} symbols are implemented in the dialog functions?::
+* Which @TeX{} symbols are implemented in dialog functions?::
 @end menu
 
 @c ------------------------------------------------------------------------
@@ -385,8 +385,8 @@
 @seealso{javamem}
 
 @c ------------------------------------------------------------------------
-@node Which @TeX{} symbols are implemented in the dialog functions?
-@subsection Which @TeX{} symbols are implemented in the dialog functions?
+@node Which @TeX{} symbols are implemented in dialog functions?
+@subsection Which @TeX{} symbols are implemented in dialog functions?
 @c - index -
 @cindex symbols, translation table
 @cindex @TeX{} symbols, translation table