Add comprehensive test suite for copy-as-format package#10

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mastersshaw/copy-as-format:masterfrom

copilot/fix-1c2bbb33-2077-42b5-8cbd-a160b1e299a2sshaw/copy-as-format:copilot/fix-1c2bbb33-2077-42b5-8cbd-a160b1e299a2Copy head branch name to clipboard