Fix missing shebang in some files

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changelog
 
 ### master
+- bug: add missing shebang in some files.
 
 ### v3.1.0, 2023-01-03
 - upgrade to new version of `tmux-test`

scripts/helpers/plugin_functions.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 # using @tpm_plugins is now deprecated in favor of using @plugin syntax
 tpm_plugins_variable_name="@tpm_plugins"
 

scripts/helpers/shell_echo_functions.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 echo_ok() {
 	echo "$*"
 }

scripts/helpers/tmux_echo_functions.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 _has_emacs_mode_keys() {
 	$(tmux show -gw mode-keys | grep -q emacs)
 }

scripts/helpers/tmux_utils.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 HELPERS_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 source "$HELPERS_DIR/plugin_functions.sh"
 

scripts/helpers/utility.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 ensure_tpm_path_exists() {
 	mkdir -p "$(tpm_path)"
 }

scripts/variables.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 install_key_option="@tpm-install"
 default_install_key="I"