Disable Layout cops on == method

The Puppet::Pops::Validation::Diagnostic#== method triggers multiple
Rubocop Layout offenses. Despite that, it's unclear if there is another
way to format the method to improve readability.

This commit disables all Rubocop Layout cops on this method.

Author: mhashizume

lib/puppet/pops/validation.rb

@@ -243,7 +243,7 @@ def initialize severity, issue, file, source_pos, arguments = {}, exception = ni
 
     # Two diagnostics are considered equal if the have the same issue, location and severity
     # (arguments and exception are ignored)
-    # rubocop:disable Layout/ExtraSpacing
+    # rubocop:disable Layout
     def ==(o)
       self.class            == o.class             &&
         same_position?(o)                          &&
@@ -252,7 +252,7 @@ def ==(o)
         severity            == o.severity
     end
     alias eql? ==
-    # rubocop:enable Layout/ExtraSpacing
+    # rubocop:enable Layout
 
     # Position is equal if the diagnostic is not located or if referring to the same offset
     def same_position?(o)