mysql@5.6: fix RuboCop Style/TrailingBodyOnMethodDefinition.

Formula/mysql@5.6.rb

@@ -95,7 +95,8 @@ class MysqlAT56 < Formula
     end
   end
 
-  def caveats; <<~EOS
+  def caveats
+    <<~EOS
       A "/etc/my.cnf" from another install may interfere with a Homebrew-built
       server starting up correctly.
 
@@ -108,7 +109,8 @@ class MysqlAT56 < Formula
 
   plist_options :manual => "#{HOMEBREW_PREFIX}/opt/mysql@5.6/bin/mysql.server start"
 
-  def plist; <<~EOS
+  def plist
+    <<~EOS
       <?xml version="1.0" encoding="UTF-8"?>
       <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
       <plist version="1.0">