Index: doc/Makefile.am
--- doc/Makefile.am.orig
+++ doc/Makefile.am
@@ -31,7 +31,8 @@ install-data-local:
 
 HELP.md: mastodon-help.txt Makefile
 	sed \
-	-e '1i# Bitlbee Mastodon\nThis document was generated from the help text for the plugin.\n' \
+	-e '1i\
+	# Bitlbee Mastodon\nThis document was generated from the help text for the plugin.\n' \
 	-e '1d' \
 	-e 's/^%$$//g' \
 	-e 's/^\?mastodon /## /g' \