Updated the scripts shebang for portability

- Updated all of the sh and bash shebangs for consistency and portability.
- set -e to the test script for portability
Resolves #3857

script/bootstrap

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 script/branding
 bundle install -j8

script/branding

@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/usr/bin/env bash
 
 echo " ---------------------------------------------------------- "
 echo "          _   ______   _  __ __     __  _        _          "

script/cibuild

@@ -1,4 +1,4 @@
-#! /bin/bash -e
+#!/usr/bin/env bash
 
 script/branding
 

script/cucumber

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 if ruby --version | grep -q "jruby"
 then

script/proof

@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/usr/bin/env bash
 #
 # Usage:
 #   script/proof

script/rebund

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # rebund(1)
 #

script/rubyprof

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+
 export BENCHMARK=1
 
 TEST_SCRIPT="Jekyll::Commands::Build.process({'source' => 'site', 'full_rebuild' => true})"

script/test

@@ -1,4 +1,5 @@
-#! /bin/bash -e
+#!/usr/bin/env bash
+set -e
 
 # Usage:
 #   script/test <test_file>