noweb: fix RuboCop Style/TrailingBodyOnMethodDefinition.

Formula/noweb.rb

@@ -42,13 +42,14 @@ class Noweb < Formula
     end
   end
 
-  def caveats; <<~EOS
+  def caveats
-    TeX support files are installed in the directory:
+    <<~EOS
+      TeX support files are installed in the directory:
 
-      #{texpath}
+        #{texpath}
 
-    You may need to add the directory to TEXINPUTS to run noweb properly.
+      You may need to add the directory to TEXINPUTS to run noweb properly.
-  EOS
+    EOS
   end
 
   test do