update-tables: Improve char width table parsing

Make the script used to parse EastAsianWidth more robust, mapping
ambiguous width characters to double-width ones.

Author: aperezdc

.github/workflows/build.yml

@@ -47,6 +47,7 @@ jobs:
           timeout 120 busted -c
       - name: Coverage Report
         run: |
+          source env/bin/activate
           luacov-coveralls --dryrun -e '.luarocks/' -e spec/ -e luarocks/ -i wcwidth/ -i wcwidth.lua -o coveralls.json -v
       - name: Coveralls
         uses: coverallsapp/github-action@v2

update-tables

@@ -75,20 +75,21 @@ wide_table () {
 	local tmpfile="${TMPDIR:-/tmp}/update-tables-$$-${RANDOM}"
 	echo "-- Autogenerated from ${WIDE_FILE##*/}"
 	echo 'return {'
-	while read -r item rest ; do
-		if [[ -z ${item} || ${item} = \#* ]] ; then
+	while read -r line ; do
+		if [[ -z ${line} || ${line} = \#* ]] ; then
+			read -r line rest <<< "${line}"
 			if [[ ${rest} = *.txt ]] ; then
 				WIDE_VER=${rest}
 			elif [[ ${rest} = Date:\ 20* || ${rest} = ©\ 20* ]] ; then
 				WIDE_VER="${WIDE_VER}, ${rest}"
 			fi
 			continue
 		fi
-		range=${item%;*}
-		flags=${item#*;}
-		if [[ ${flags} = W* || ${flags} = F* ]] ; then
-			format_range "${range}"
-		fi
+		read -r -a items <<< "${line}"
+		case ${items[2]} in
+			F | W | A )
+				format_range "${items[0]}" ;;
+		esac
 	done > "${tmpfile}"
 	sort "${tmpfile}"
 	rm "${tmpfile}"