Print symbols with ratio-like names and the associated ratios distinctly. src/ChangeLog addition: 2010-08-15 Aidan Kehoe <kehoea@parhasard.net> * print.c (print_symbol): Escape any symbols that look like ratios, in the same way we do symbols that look like floats or integers. Prevents confusion in the Lisp reader. * lread.c (isratio_string): Make this available even on builds without HAVE_RATIO, so we can print symbols that look like ratios with the appropriate escapes. * lisp.h: Make isratio_string available even if HAVE_RATIO is not defined. tests/ChangeLog addition: 2010-08-15 Aidan Kehoe <kehoea@parhasard.net> * automated/lisp-tests.el: Test that symbols with names that look like ratios are printed distinctly from the equivalent ratios.

--- a/src/lisp.h	Sat Jul 24 17:38:35 2010 +0100
+++ b/src/lisp.h	Sun Aug 15 13:29:10 2010 +0100
@@ -5355,9 +5355,7 @@
 int locate_file (Lisp_Object, Lisp_Object, Lisp_Object, Lisp_Object *, int);
 EXFUN (Flocate_file_clear_hashing, 1);
 int isfloat_string (const char *);
-#ifdef HAVE_RATIO
 int isratio_string (const char *);
-#endif
 
 /* Well, I've decided to enable this. -- ben */
 /* And I've decided to make it work right.  -- sb */