More portable bash shebang

activate.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Let PATH include 'xpanes' and 'tmux-xpanes'.
 if ! (type xpanes > /dev/null 2>&1 &&

install.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -ue
 
 readonly THIS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" && pwd)"

man/create.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # In bash,
 # Use md2man (https://github.com/sunaku/md2man) to generate man file like this.

test/unit.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Test cases given by this file is not executed on the CI server.
 # This file is just used for brief behavior checking during the development.

test/update_yaml.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -eu
 readonly THIS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" && pwd)"
 

uninstall.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -ue
 
 readonly THIS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" && pwd)"