Deprecate ignoring (per #62)

conditions.lisp

@@ -1,30 +1,11 @@
 (in-package #:serapeum)
 
 (defmacro ignoring (type &body body)
-  "An improved version of `ignore-errors`.
-
-The behavior is the same: if an error occurs in the body, the form
-returns two values, `nil` and the condition itself.
-
-`ignoring` forces you to specify the kind of error you want to ignore:
-
-    (ignoring parse-error
-      ...)
-
-I call it an improvement because I think `ignore-errors` is too broad:
-by hiding all errors it becomes itself a source of bugs.
-
-Of course you can still ignore all errors, at the cost of one extra
-character:
-
-    (ignoring error
-      ...)
-
-NB `(ignoring t)` is a bad idea."
-  `(handler-case
-       (progn ,@body)
-     (,type (c)
-       (values nil c))))
+  "DEPRECATED: use `alexandria:ignore-some-conditions` instead."
+  (simple-style-warning "~s is deprecated, use ~s instead"
+                        'ignoring 'ignore-some-conditions)
+  `(ignore-some-conditions (,type)
+     ,@body))
 
 (defun maybe-invoke-restart (restart &rest values)
   "When RESTART is active, invoke it with VALUES."