Deal better with sre_parse deprecation

Author: vaeth

ChangeLog

@@ -1,5 +1,10 @@
 # ChangeLog for replacer
 
+*replacer-3.4
+	Martin Väth <martin at mvath.de>:
+	- Deal better with sre_parse deprecation:
+	  Suppress warning and check if sre_parse.expand_template exists.
+
 *replacer-3.3
 	Martin Väth <martin at mvath.de>:
 	- Make replacer work with current versions of colorama.

bin/replacer

@@ -11,19 +11,23 @@ import locale
 import os
 import re
 import sys
+import warnings
+warnings.filterwarnings("ignore", category=DeprecationWarning)
 
-version = '3.3'
+version = '3.4'
 
 # Set localedir to e.g. '/usr/share/locale' to fix the gettext (nls) path.
 # If localedir == '', the value is fetched from $REPLACER_NLS or $NLS.
 # If localedir is None, gettext (nls) is not used.
 localedir = ''
 
+warnings.filterwarnings("ignore", category=DeprecationWarning)
 try:
     import sre_parse
-    have_sre_parse = True
+    have_sre_parse = "expand_template" in dir(sre_parse)
 except ImportError:
     have_sre_parse = False
+warnings.resetwarnings()
 
 if localedir is not None:
     try: