Log Message:
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shell-script/pre-commit-git-diff-docx.sh: (0.3.0) Fix bug. dtdoering's patch avoids trying to create the .md file with pandoc if the .docx has been deleted. It also deletes the .md file
if the .docx file has been deleted. But the delete is not commited. Now we add the deleted .md file to .commit-amend-markdown so that the post-commit hook commits the delete.