Issue #91: Improve the regex used for matching ticket numbers to links,

thanks to Sumeet A.

templatetags/ticket_to_link.py

@@ -37,7 +37,7 @@ def num_to_link(text):
         return text
 
     matches = []
-    for match in re.finditer(" #(\d+)", text):
+    for match in re.finditer(r"(?:[^&]|\b|^)#(\d+)\b", text):
         matches.append(match)
 
     for match in ReverseProxy(matches):