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* Fix and addition to git-diff
@ 2019-10-30  9:10 Олег Самойлов
  0 siblings, 0 replies; only message in thread
From: Олег Самойлов @ 2019-10-30  9:10 UTC (permalink / raw)
  To: git

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.

--- 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].

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2019-10-30  9:10 Fix and addition to git-diff Олег Самойлов

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