`bash` completions instructions should be correct/consistent

[rickhg12hs]

Problem you are trying to solve

Executing rustup completions --help outputs:

...
$ rustup completions bash >> ~/.local/share/bash-completion/completions/rustup
...

"The rustup book" shows:

...
# Bash
$ rustup completions bash > ~/.local/share/bash-completion/completions/rustup
...

Note the >> vs > difference. I'm no expert, but it seems > is correct.

Not that it makes a real difference (as far as I know), but other files I see in ~/.local/share/bash-completion/completions all have extension .bash, so perhaps ~/.local/share/bash-completion/completions/rustup.bash might more align the file name with others in the directory.

Solution you'd like

Have all documentation/help about bash completions be correct and consistent - preferably:

$ rustup completions bash > ~/.local/share/bash-completion/completions/rustup.bash

Notes

I see several other issues and PRs related to completions, so perhaps this issue could be resolved while addressing those.

[rami3l]

@rickhg12hs Thanks a lot for your report! It does look like a typo, would you mind sending a PR for this?

[rickhg12hs]

@rami3l I think I can do that. Is my rustup.bash observation correct, i.e., OK to include the extension?

[rami3l]

@rickhg12hs I would suggest leaving the extension part for now, as I believe it is not relevant in terms of shell completion.

[rickhg12hs]

PR submitted: #4378