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Kevin Daudt authored
apkbuild-lint guards against parameters starting with a double underscore as they are reserved. But the check for this is a bit too eager and also warns when something starts with a double underscore which is not a variable. For example: ```sh function foo() { make -D__VAR=value } ``` is a legal construct, but this resulted in a warning. This is because the start-of-string / tab part was marked optional, which makes the test look for anything starting with a double underscore. Remove the `?` from the group to actual anchor the check. Fixes #24
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