Merge branch 'pb/diff-doc-raw-format' into maint

Update "git diff/log --raw" format documentation.
source: <[email protected]>

* pb/diff-doc-raw-format:
  diff-index.txt: update raw output format in examples
  diff-format.txt: correct misleading wording
  diff-format.txt: dst can be 0* SHA-1 when path is deleted, too

Author: gitster

Documentation/diff-format.txt

@@ -43,7 +43,7 @@ That is, from the left to the right:
 . a space.
 . sha1 for "src"; 0\{40\} if creation or unmerged.
 . a space.
-. sha1 for "dst"; 0\{40\} if creation, unmerged or "look at work tree".
+. sha1 for "dst"; 0\{40\} if deletion, unmerged or "work tree out of sync with the index".
 . a space.
 . status, followed by optional "score" number.
 . a tab or a NUL when `-z` option is used.
@@ -69,8 +69,8 @@ percentage of similarity between the source and target of the move or
 copy).  Status letter M may be followed by a score (denoting the
 percentage of dissimilarity) for file rewrites.
 
-<sha1> is shown as all 0's if a file is new on the filesystem
-and it is out of sync with the index.
+The sha1 for "dst" is shown as all 0's if a file on the filesystem
+is out of sync with the index.
 
 Example:
 

Documentation/git-diff-index.txt

@@ -69,8 +69,8 @@ done an `update-index` to make that effective in the index file.
 matches my working directory. But doing a 'git diff-index' does:
 
   torvalds@ppc970:~/git> git diff-index --cached HEAD
-  -100644 blob    4161aecc6700a2eb579e842af0b7f22b98443f74        commit.c
-  +100644 blob    4161aecc6700a2eb579e842af0b7f22b98443f74        git-commit.c
+  :100644 000000 4161aecc6700a2eb579e842af0b7f22b98443f74 0000000000000000000000000000000000000000 D	commit.c
+  :000000 100644 0000000000000000000000000000000000000000 4161aecc6700a2eb579e842af0b7f22b98443f74 A	git-commit.c
 
 You can see easily that the above is a rename.
 
@@ -103,7 +103,7 @@ have not actually done a 'git update-index' on it yet - there is no
 "object" associated with the new state, and you get:
 
   torvalds@ppc970:~/v2.6/linux> git diff-index --abbrev HEAD
-  :100644 100664 7476bb... 000000...      kernel/sched.c
+  :100644 100644 7476bb5ba 000000000 M	kernel/sched.c
 
 i.e., it shows that the tree has changed, and that `kernel/sched.c` is
 not up to date and may contain new stuff. The all-zero sha1 means that to