I have git installed via [scoop](https://scoop.sh). The current
implementation finds `git.exe` in scoop's shims folder and then tries to
find `bash.exe` relative to it.
For example, `git.exe` (shim) is located at:
```
C:\Users\<username>\scoop\shims\git.exe
```
And the code tries to find `bash.exe` at:
```
C:\Users\<username>\scoop\shims\..\bin\bash.exe
```
which doesn't exist.
This PR changes the logic to first check if `bash.exe` is available in
PATH (using `which::which`), and only falls back to the git-relative
path if that fails.
qystishere
3072133e59