-Create a new, empty patch and make it the topmost one. If the
-'--message' option is not passed, an editor is invoked with the
-.git/patchdescr.tmpl, ~/.stgit/templates/patchdescr.tmpl or
-/usr/share/stgit/templates/patchdescr.tmpl file used a as template,
-together with generated lines. The local changes in the working tree
-are not included in the patch; an "stg refresh" command is needed for
-this.
+The given name must be unique in the stack, and may only contain
+alphanumeric characters, dashes and underscores. If no name is given,
+one is generated from the first line of the patch's commit message.