Fix up the rest of the code that still uses slice

Since slice was renamed to cut, update some newly introduced functions
and macros that were using slice, to use cut instead.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

hy/core/language.hy

@@ -416,7 +416,7 @@
   "Convert the given value to a string. Keyword special character will be stripped.
   String will be used as is. Even objects with the __name__ magic will work"
   (if (and (string? value) (value.startswith *keyword-prefix*))
-    (hyify (slice value 2))
+    (hyify (cut value 2))
     (if (string? value)
       (hyify value)
       (try

hy/core/macros.hy

@@ -221,6 +221,6 @@
     ret))
 
 (defreader @ [expr]
-  (let [[decorators (slice expr nil -1)]
+  (let [[decorators (cut expr nil -1)]
         [fndef (get expr -1)]]
     `(with-decorator ~@decorators ~fndef)))

hy/core/shadow.hy

@@ -67,7 +67,7 @@
     (raise (TypeError "Need at least 2 arguments to compare"))
     (reduce operator.and_
             (list-comp (op x y)
-                       [(, x y) (zip args (slice args 1))]))))
+                       [(, x y) (zip args (cut args 1))]))))
 (defn < [&rest args]
   "Shadow < operator for when we need to import / map it against something"
   (comp-op operator.lt args))