URL: https://github.com/peterbe/hashin/issues/15

Thank you @davehunt for finding a ugly bug in in hashin.

The bug happened when you tried to add a package that had a similar name to a package that was already in your requirements.txt. By similar name, it was if the package name was inside another name. E.g. 'selenium==' in 'pytest-selenium=='.

Here's the fix.

So make sure you upgrade to version >0.5.

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