* lib/quote.h, lib/quote.c, lib/quotearg.h, lib/quotearg.c:

* m4/prereq.m4, m4/c-bs-a.m4, m4/mbstate.m4:
New files, from Fileutils 4.0.27.
* src/main.c (printable_version): Remove.
* src/lex.c, src/reader.c: Use `quote'.


* lib/error.c, lib/error.h: New files, needed by xmalloc.c.

lib/quote.h

@@ -0,0 +1,4 @@
+/* prototypes for quote.c */
+
+char const *quote_n (int n, char const *name);
+char const *quote (char const *name);