fix: wrong fold option in usage functions

agenda

@@ -37,7 +37,7 @@ AGENDA_DEFAULT=${AGENDA_DEFAULT:-"agenda"}
 AGENDA_TMPL="${AGENDA_TMPL:-"# {name} {date}\\n\\n- [ ] "}"
 
 __usage() {
-	fold -s <<-USAGE
+	fold -w <<-USAGE
 	Usage: ${0##*/} [-bcE] [-e <extension>] [-t <name>] [<date>]
 	       ${0##*/} <subcommand>
 
@@ -82,7 +82,7 @@ __main() {
 }
 
 __edit_usage() {
-	fold -s <<-USAGE
+	fold -w <<-USAGE
 	Usage: ${0##*/} edit [-bcE] [-e <extension>] [-t <name>] [<date>]
 
 	Edit an agenda file.
@@ -176,7 +176,7 @@ __edit() {
 }
 
 __list_usage() {
-	fold -s <<-USAGE
+	fold -w <<-USAGE
 	Usage: ${0##*/} list [-ac] [-u <date>] [-t <name>] [<date>]
 
 	List a range of agenda files.