urh: Use language-specific heredocs

Author: issyl0

Formula/u/urh.rb

@@ -50,12 +50,12 @@ def install
   end
 
   test do
-    (testpath/"test.py").write <<~EOS
+    (testpath/"test.py").write <<~PYTHON
       from urh.util.GenericCRC import GenericCRC;
       c = GenericCRC();
       expected = [0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0]
       assert(expected == c.crc([0, 1, 0, 1, 1, 0, 1, 0]).tolist())
-    EOS
+    PYTHON
     system libexec/"bin/python3", "test.py"
 
     # test command-line functionality