Update behavior for postCommand.strategy=post-index-change #748
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This feature was introduced in #736 but had a few pain points that were discovered when testing the full replacement of the existing post-index-change and post-command hooks in our internal environment:
core.hooksPathto point to a directory within the worktree, the sentinel files were being written into the worktree. Write to$GITDIR/info/instead.Tests are added to confirm both of these behavior changes.