treewide: clean up 'meta = with' pattern

This commit was created by a combination of scripts and tools:
- an ast-grep script to prefix things in meta with `lib.`,
- a modified nixf-diagnose / nixf combination to remove unused `with
lib;`, and
- regular nixfmt.

Co-authored-by: Wolfgang Walther <walther@technowledgy.de>

pkgs/development/python2-modules/configparser/default.nix

@@ -25,9 +25,9 @@ buildPythonPackage rec {
     export LC_ALL=${if stdenv.hostPlatform.isDarwin then "en_US" else "C"}.UTF-8
   '';
 
-  meta = with lib; {
+  meta = {
     description = "Updated configparser from Python 3.7 for Python 2.6+";
-    license = licenses.mit;
+    license = lib.licenses.mit;
     homepage = "https://github.com/jaraco/configparser";
   };
 }