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-rw-r--r--Documentation/git-merge.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/git-merge.txt b/Documentation/git-merge.txt
index 0c9ad7f2bb..c136b10692 100644
--- a/Documentation/git-merge.txt
+++ b/Documentation/git-merge.txt
@@ -68,7 +68,8 @@ HOW MERGE WORKS
---------------
A merge is always between the current `HEAD` and one or more
-remote branch heads, and the index file must exactly match the
+commits (usually, branch head or tag), and the index file must
+exactly match the
tree of `HEAD` commit (i.e. the contents of the last commit) when
it happens. In other words, `git-diff --cached HEAD` must
report no changes.