Fix handling of suffix with = in it

Author: glostis

git-open

@@ -46,7 +46,8 @@ done
 
 # parse suffix from suffix=value
 IFS='=' read -ra suffix_flag <<< "$suffix_flag"
-suffix=${suffix_flag[1]}
+function join_by { local IFS="$1"; shift; echo "$*"; }
+suffix=$(join_by = ${suffix_flag[@]:1})
 
 # are we in a git repo?
 if ! git rev-parse --is-inside-work-tree &>/dev/null; then