word. This way, you can expand an abbrev with a prefix: insert
the prefix, use this command, then insert the abbrev.
-This command a hyphen after the prefix, and if the abbrev is
-subsequently expanded, this hyphen will be removed.
+This command inserts a hyphen after the prefix, and if the abbrev
+is subsequently expanded, this hyphen will be removed.
If the prefix is itself an abbrev, this command expands it,
unless ARG is non-nil. Interactively, ARG is the prefix