Fix formatting to pass shellcheck

Author: glostis

git-open

@@ -47,7 +47,7 @@ done
 # parse suffix from suffix=value
 IFS='=' read -ra suffix_flag <<< "$suffix_flag"
 function join_by { local IFS="$1"; shift; echo "$*"; }
-suffix=$(join_by = ${suffix_flag[@]:1})
+suffix=$(join_by "=" "${suffix_flag[@]:1}")
 
 # are we in a git repo?
 if ! git rev-parse --is-inside-work-tree &>/dev/null; then