Changed pattern for detecting _..._ text. We now require that

at least one space precedes the first underscore. This is neccessary
for handling underscores inside DTML vars.

lib/python/StructuredText/ClassicDocumentClass.py

@@ -632,7 +632,7 @@ class DocumentClass:
     
     def doc_underline(self,
                       s,
-                      expr=re.compile("\s*\_([%s0-9\s\.,\?\/]+)\_" % letters).search):
+                      expr=re.compile("\s+\_([%s0-9\s\.,\?\/]+)\_" % letters).search):
         
         result = expr(s)
         if result:

lib/python/StructuredText/DocumentClass.py

@@ -914,7 +914,7 @@ class DocumentClass:
     
     def doc_underline(self,
                       s,
-                      expr=re.compile(r"\s*\_([%s0-9\s\.,\?]+)\_" % letters).search):
+                      expr=re.compile(r"\s+\_([%s0-9\s\.,\?]+)\_" % letters).search):
         
         result = expr(s)
         if result: