[2.7] bpo-27726: Fix "make tags" command by vstinner · Pull Request #1337 · python/cpython

Backport enhancements from master, commits:

* 9c4bfa6: "make tags": remove -t
  option of ctags. The option was kept for backward compatibility,
  but it was completly removed recently. Patch written by Stéphane
  Wirtel.
* cf0ac6a: Fix "make tags": set
  locale to C to call sort
* 8a543c0: `make tags` fixes (GH-717)