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2008-09-25 Eric Blake <ebb9@byu.net>
+ Tweak error message on command line failure.
+ * m4/m4private.h (includes): Use "quotearg.h".
+ * src/main.c (process_file, main): Use nicer quotes for file name
+ in error messages.
+ * m4/input.c (file_clean, m4_push_file): Likewise.
+ * m4/module.c (m4__module_open): Likewise.
+ * src/freeze.c (produce_frozen_state, reload_frozen_state):
+ Likewise.
+ * modules/gnu.c (debugfile): Likewise.
+ * modules/m4.c (undivert, include): Likewise.
+ * tests/others.at (directory, stdin closed): Update tests.
+ * tests/options.at (file names, --debugmode): Likewise.
+ * doc/m4.texinfo (Debugmode): Likewise.
+
Unify error handling for reading directories.
* m4/path.c (m4_path_search): Factor open attempts...
(m4_fopen): ...into new function, to reject directories.