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-rw-r--r--diff.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/diff.h b/diff.h
index c3486ffa86..5696f2aff0 100644
--- a/diff.h
+++ b/diff.h
@@ -103,7 +103,7 @@ extern void diffcore_std_no_resolve(struct diff_options *);
" --name-only show only names of changed files.\n" \
" --name-status show names and status of changed files.\n" \
" --full-index show full object name on index lines.\n" \
-" --abbrev abbreviate object names in diff-tree header and diff-raw.\n" \
+" --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
" -R swap input file pairs.\n" \
" -B detect complete rewrites.\n" \
" -M detect renames.\n" \