ditaa: install binary with write_jar_script

Author: EricFromCanada

Formula/d/ditaa.rb

@@ -15,10 +15,7 @@ class Ditaa < Formula
 
   def install
     libexec.install "ditaa-#{version}-standalone.jar"
-    (bin/"ditaa").write <<~BASH
-      #!/bin/bash
-      exec "#{Formula["openjdk"].opt_bin}/java" -jar "#{libexec}/ditaa-#{version}-standalone.jar" "$@"
-    BASH
+    bin.write_jar_script libexec/"ditaa-#{version}-standalone.jar", "ditaa"
   end
 
   test do