Applied Rubocop rules that I likerubocop

- Other linting configuration also applied.
- Soft-deprecating versions older than 2.3.

1 files changed, 4 insertions, 1 deletions

diff --git a/bin/ldiff b/bin/ldiff
index a9b876f..f4734f5 100755
--- a/bin/ldiff
+++ b/bin/ldiff
@@ -1,6 +1,9 @@
-#!ruby -w
+#! /usr/bin/env ruby -w
+# frozen_string_literal: true
 
 require 'diff/lcs'
 require 'diff/lcs/ldiff'
 
 exit Diff::LCS::Ldiff.run(ARGV)
+
+# vim: ft=ruby