diff --git a/sh/main.sh b/sh/main.sh
index f51b918..75b1815 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -94,11 +94,11 @@ rwx_source() {
 	[ -d "${root}" ] ||
 		return 1
 	local file="${2}"
-	local count module
+	local count module modules
 	count=0
 	__rwx_log "" \
 		". ${root}"
-	local modules="$(rwx_find_shell "${root}" "${file}")"
+	modules="$(rwx_find_shell "${root}" "${file}")"
 	while IFS= read -r module; do
 		count=$((count + 1))
 		__rwx_log "$(printf "%02d" "${count}") ${module%.sh}"
@@ -231,23 +231,23 @@ rwx_parse_variables() {
 
 #= rt
 rwx_test() {
-    local item
-    set \
-        "main" \
-        "alias/git" \
-        \
-        "RWX_MAIN_NAME" \
-        \
-        "_rwx_code" \
-        \
-        "rwx_cache" \
-        \
-        "alias/batcat" \
-        "b"
-    for item in "${@}"; do
-        echo
-        rwx_doc "${item}"
-    done
+	local item
+	set \
+		"main" \
+		"alias/git" \
+		\
+		"RWX_MAIN_NAME" \
+		\
+		"_rwx_code" \
+		\
+		"rwx_cache" \
+		\
+		"alias/batcat" \
+		"b"
+	for item in "${@}"; do
+		echo
+		rwx_doc "${item}"
+	done
 }
 
 # ╭──────┬─────╮
diff --git a/sh/self.sh b/sh/self.sh
index e2c30f7..4d88414 100644
--- a/sh/self.sh
+++ b/sh/self.sh
@@ -4,31 +4,31 @@
 # show the cached code
 #= rc
 rwx_code() {
-    echo "${_rwx_code}"
+	echo "${_rwx_code}"
 }
 
 # show the cached aliases
 #= rca
 rwx_code_aliases() {
-    echo "${RWX_ALIASES}"
+	echo "${RWX_ALIASES}"
 }
 
 # show the cached constants
 #= rcc
 rwx_code_constants() {
-    echo "${RWX_CONSTANTS}"
+	echo "${RWX_CONSTANTS}"
 }
 
 # show the cached functions
 #= rcf
 rwx_code_functions() {
-    echo "${RWX_FUNCTIONS}"
+	echo "${RWX_FUNCTIONS}"
 }
 
 # show the cached variables
 #= rcv
 rwx_code_variables() {
-    echo "${_rwx_code_variables}"
+	echo "${_rwx_code_variables}"
 }
 
 # meta doc
@@ -222,10 +222,10 @@ rwx_self_write() {
 	local target="${1}"
 	if [ -n "${target}" ]; then
 		shift
-		local file text
+		local file files text
 		text="#! /usr/bin/env sh
 "
-		local files="$(rwx_self_subset "${@}")"
+		files="$(rwx_self_subset "${@}")"
 		while IFS= read -r file; do
 			text="${text}
 $(cat "${RWX_ROOT_SYSTEM}/${file}")
diff --git a/sh/tmux.sh b/sh/tmux.sh
index 85a616f..9213e01 100644
--- a/sh/tmux.sh
+++ b/sh/tmux.sh
@@ -6,7 +6,7 @@
 #= tma
 rwx_tmux_attach() {
 	local server="${1}"
-	if [ "${server}" ]; then
+	if [ -n "${server}" ]; then
 		tmux -L "${server}" attach-session
 	else
 		rwx_tmux_list
@@ -17,7 +17,7 @@ rwx_tmux_attach() {
 #= tmk
 rwx_tmux_kill() {
 	local server="${1}"
-	if [ "${server}" ]; then
+	if [ -n "${server}" ]; then
 		tmux -L "${server}" kill-server 2>"/dev/null"
 	else
 		rwx_tmux_list
@@ -27,7 +27,9 @@ rwx_tmux_kill() {
 # list
 #= tml
 rwx_tmux_list() {
-	ls "/tmp/tmux-$(id --user)"
+	local user_id
+	user_id="$(id --user)"
+	ls "/tmp/tmux-${user_id}"
 }
 
 # ╭──────┬───────╮