Dawid Dziurla 1e805e04f9
bump-formula-pr: fix when no 'version' stanza in formula found
Without this fix, a command like:

    `brew bump-formula-pr --version=0.3.3 --tag=v0.3.3 --revision=... test-formula-git-revision`

will fail because:

```
Error: no implicit conversion of nil into String
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/bump-formula-pr.rb:281:in `escape'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/bump-formula-pr.rb:281:in `bump_formula_pr'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb:111:in `<main>'
```

Additionally, reject all `nil` replacement pairs by calling `compact`
method.
2020-07-26 10:26:39 +02:00
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