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Fix and addition to git-diff

Message ID 232BC77E-F22E-469A-8839-6A1553A75B55@ya.ru (mailing list archive)
State New, archived
Headers show
Series Fix and addition to git-diff | expand

Commit Message

Олег Самойлов Oct. 30, 2019, 9:10 a.m. UTC
Hi all.

This is a small patch with fix and addition to the man git-diff. This fix is obvious mistyping in man, there must be "..." instead of "..".

And I added an example about how this can be used. The reason is:

First, I don't know another reason to use a tree-ish with git diff. 
Second, the diff with empty tree is a real problem on what some people looking for solution (for various reasons):


And the solutions are not simple nor obvious. So I think it will be helpful to mention it.
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--- a/Documentation/git-diff.txt
+++ b/Documentation/git-diff.txt
@@ -77,8 +77,16 @@  two blob objects, or changes between two files on disk.

 Just in case you are doing something exotic, it should be
 noted that all of the <commit> in the above description, except
-in the last two forms that use ".." notations, can be any
+in the last form, that use the "\..." notation, can be any
+<tree>. For instance, if you want to make diffs against an empty
+tree, you can create a tag pointing to the empty tree:
+'git tag' empty $('git hash-object' -t tree /dev/null)
+And use it for the 'git diff', for instance, to check a working tree
+for whitespaces:
+'git diff' --check empty

 For a more complete list of ways to spell <commit>, see
 "SPECIFYING REVISIONS" section in linkgit:gitrevisions[7].