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-rw-r--r--Documentation/git-rev-parse.txt5
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index 4b4d229e6..4758c33de 100644
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -215,7 +215,10 @@ blobs contained in a commit.
* A colon, optionally followed by a stage number (0 to 3) and a
colon, followed by a path; this names a blob object in the
index at the given path. Missing stage number (and the colon
- that follows it) names an stage 0 entry.
+ that follows it) names an stage 0 entry. During a merge, stage
+ 1 is the common ancestor, stage 2 is the target branch's version
+ (typically the current branch), and stage 3 is the version from
+ the branch being merged.
Here is an illustration, by Jon Loeliger. Both node B and C are
a commit parents of commit node A. Parent commits are ordered