pukkandan c32b0aab8a
Improve --sub-langs (see desc)
* Treat `--sub-langs` entries as regex
* `all` can be used to refer to all the subtitles
* the language code can be prefixed with `-` to exclude it
* Deprecates `--all-subs`
Closes #253
2021-04-20 02:58:03 +05:30
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