Version of GitBash is not detected correctly

[a-ludi]

Shell version detection did not work if BASH_VERSION included syntactically relevant symbols, e.g. parenthesis:

/bin/bash: -c: line 0: syntax error near unexpected token `('
/bin/bash: -c: line 0: `echo 5.0.17(1)-release'

I do not know how to replicate the bug, really. You would have to trick Bash into spitting out a problematic version string. Mine does that of its own accord.

It should detect the version as major=5 and minor=0.

Environment:

• Python version: irrelevant
• Click version: 8.0.3

[davidism]

Duplicate of #2461