Update parsetree.py removed "?" from for x in re.compile(r"(\${.+})" …

…which was preventing a dict from being consumed as an expression in ${}

mako/parsetree.py

@@ -322,7 +322,7 @@ def _parse_attributes(self, expressions, nonexpressions):
         for key in self.attributes:
             if key in expressions:
                 expr = []
-                for x in re.compile(r"(\${.+?})", re.S).split(
+                for x in re.compile(r"(\${.+})", re.S).split(
                     self.attributes[key]
                 ):
                     m = re.compile(r"^\${(.+?)}$", re.S).match(x)