Improved preserve_handlebar_syntax regex

Author: peterbe

premailer/premailer.py

@@ -345,7 +345,7 @@ def transform(self, html=None, pretty_print=True, **kwargs):
             # <a href="{{ "<Test>" }}"></a>
             if self.preserve_handlebar_syntax:
                 stripped = re.sub(
-                    r'="{{(.*?)}}"',
+                    r'="([^"]*){{(.*?)}}([^"]*?)"',
                     lambda match: '="{{' + escape(match.groups()[0]) + '}}"',
                     stripped,
                 )