From 3031ace14b82d02324b366665ae779485c04d516 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Wed, 24 Apr 2019 01:25:10 -0400
Subject: parse_control(): Fix/improve missing fields handling

---
diff --git a/src/control.sh b/src/control.sh
index bb0c0e6..30e594e 100644
--- a/src/control.sh
+++ b/src/control.sh
@@ -79,16 +79,23 @@ parse_control()
 					if ! "${paragraph_cb}"; then
 						return 0
 					fi
-					if [ -n "${para_req_fields}" ]; then
+					case "${para_req_fields}" in *[!\ ]*)
+						# Missing required control
+						# fields.
+						sep="$(get_msg \
+							'list_item_separator')"
 						para_req_fields="$(printf \
-							"%s$(get_msg \
-							'list_item_separator')"\
-							${para_req_fields})"
+							"%s${sep}" \
+							${para_req_fields}; \
+							printf 'x')"
+						para_req_fields="$(: \
+							)${para_req_fields%$(: \
+							)${sep}x}"
 						_parse_control_error \
 							"${file}" "${line_nr}" \
 							'control_missing_fields'\
 							"${para_req_fields}"
-					fi
+					esac
 				fi
 				para_req_fields="${req_fields}"
 				got_fields=' '
--
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