* 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.

src/lex.c

@@ -27,9 +27,7 @@
 #include "xalloc.h"
 #include "complain.h"
 #include "gram.h"
-
-/* functions from main.c */
-extern char *printable_version PARAMS ((int));
+#include "quote.h"
 
 /* Buffer for storing the current token.  */
 char *token_buffer;
@@ -238,8 +236,10 @@ literalchar (char **pp, int *pcode, char term)
 	}
       else
 	{
+	  char buf [] = "c";
+	  buf[0] = c;
 	  complain (_("unknown escape sequence: `\\' followed by `%s'"),
-		    printable_version (c));
+		    quote (buf));
 	  code = '?';
 	}
     }				/* has \ */