Make [:graph:] act like [:print:] sans space

In POSIX [[:print:]] is equivalent to [ [:graph:]], so change
[:graph:] so that it matches everything that [:print:] does,
except for space.
* doc/lispref/searching.texi (Char Classes):
* etc/NEWS:
* lisp/emacs-lisp/rx.el (rx):
Document [:graph:] to be [:print:] sans ' '.
* src/character.c, src/character.h (graphicp): New function.
* src/regex.c (ISGRAPH) [emacs]: Use it.
(BIT_GRAPH): New macro.
(BIT_PRINT): Increase to 0x200, to make room for BIT_GRAPH.
(re_wctype_to_bit) [! WIDE_CHAR_SUPPORT]:
Return BIT_GRAPH for RECC_GRAPH.
(re_match_2_internal) [emacs]: Use ISGRAPH if BIT_GRAPH,
and ISPRINT if BIT_PRINT.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/character.c b/src/character.c
index b357dd5a334..ea98cf68e6c 100644
--- a/src/character.c
+++ b/src/character.c
@@ -1022,6 +1022,14 @@ decimalnump (int c)
   return gen_cat == UNICODE_CATEGORY_Nd;
 }
 
+/* Return 'true' if C is a graphic character as defined by its
+   Unicode properties.  */
+bool
+graphicp (int c)
+{
+  return c == ' ' || printablep (c);
+}
+
 /* Return 'true' if C is a printable character as defined by its
    Unicode properties.  */
 bool