++
+The commit message is supplied either directly with the `-m` or `-F`
+option, or indirectly from the tag or commit when the second tree-ish
+denotes such an object, or it is requested by invoking an editor (see
+`--edit` option below).
+
+-m <msg>;;
+--message=<msg>;;
+ Use the given `msg` as the commit message. This option
+ disables the `--edit` option.
+
+-F <filename>;;
+--file=<filename>;;
+ Take the commit message from the given file. This option
+ disables the `--edit` option.