Fix for parsing $@

tests/test_parser.py

@@ -2109,6 +2109,7 @@ def test_global_var(self, space):
         assert space.parse("$+") == simple_global("$+")
         assert space.parse("$,") == simple_global("$,")
         assert space.parse("$-w") == simple_global("$-w")
+        assert space.parse("$@") == simple_global("$@")
 
     def test_comments(self, space):
         r = space.parse("""

topaz/lexer.py

@@ -533,7 +533,7 @@ def dollar(self, ch):
         self.add(ch)
         self.state = self.EXPR_END
         ch = self.read()
-        if ch in "$>:?\\!\"~&`'+/,":
+        if ch in "$>:?\\!\"~&`'+/,@":
             self.add(ch)
             yield self.emit("GVAR")
         elif ch == "-" and self.peek().isalnum():