fix: isExternal check with malformed URL + tests by jhildenbiddle · Pull Request #1510

fix: isExternal check with malformed URL + tests by jhildenbiddle · Pull Request #1510 · docsifyjs/docsify

Fix #1477. Fix #1126. Follow-up to #1489.

Summary

Handles malformed remote URLs that contain more than two forward slashes (e.g., ////////domain.com/file.md)

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You have tested in the following browsers: (Providing a detailed version will be better.)