tree 513406f0548f326404ff00e67f6a7e9093c78dd2
parent 925510449984399cf58711843ddfe2e8007c3878
author INADA Naoki <methane@users.noreply.github.com> 1507878143 +0900
committer GitHub <noreply@github.com> 1507878143 +0900

bpo-31672: Fix string.Template accidentally matched non-ASCII identifiers (GH-3872)

Pattern `[a-z]` with `IGNORECASE` flag can match to some non-ASCII characters.

Straightforward solution for this is using `IGNORECASE | ASCII` flag.
But users may subclass `Template` and override only `idpattern`. So we want to
avoid changing `Template.flags`.

So this commit uses local flag `-i` for `idpattern` and change `[a-z]` to `[a-zA-Z]`.