Fix alias dots

_macro_ keys should be identifiers.
There's no valid use for `.` in local tags, so munge as if escaped.

src/hissp/macros.lissp

@@ -1205,7 +1205,7 @@ See `hissp.macros`.
   ;; See also: `prelude`, `attach`, `hissp.alias`.
   ;;
   ;;
-  `(defmacro ,(.format "{}{}" abbreviation '#)
+  `(defmacro ,(.format "{}{}" (.replace abbreviation '. '\.) '#)
              ($#attr :/ : :* $#args  :** $#kwargs)
      ',(.format "Aliases ``{}`` as ``{}#``." qualifier abbreviation)
      (let ($#attr (if-else (hissp..is_control $#attr)

src/hissp/reader.py

@@ -509,6 +509,7 @@ def _fully_qualified(tag: str):
         return cast(Fn, reduce(getattr, function.split("."), import_module(module)))
 
     def _local(self, tag: str):
+        tag = tag.replace(".", force_qz_encode("."))
         try:
             return getattr(self.lissp.env[C.MACROS], tag + munge("#"))
         except (AttributeError, KeyError):