prune: introduce OPT_EXPIRY_DATE() and use it

diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index 7bdb039d5ee9c6ed6c19c70173c733860de2d5b7..210563819190fa3e02eb89f0a24176d344e64fb0 100644 (file)
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -137,6 +137,8 @@ OPTIONS
 -m <msg>::
 --message=<msg>::
        Use the given <msg> as the commit message.
+       If multiple `-m` options are given, their values are
+       concatenated as separate paragraphs.
 
 -t <file>::
 --template=<file>::