[jsinterp] Do not expect dot in simple function call

youtube_dl/jsinterp.py

@@ -130,7 +130,7 @@ def interpret_expression(self, expr, local_vars, allow_recursion):
             return a % b
 
         m = re.match(
-            r'^(?P<func>[.a-zA-Z$]+)\((?P<args>[a-z0-9,]+)\)$', expr)
+            r'^(?P<func>[a-zA-Z$]+)\((?P<args>[a-z0-9,]+)\)$', expr)
         if m:
             fname = m.group('func')
             argvals = tuple([