Autofix results to invalid syntax when rubocop comment is removed. Style/RaiseArgs: EnforcedStyle: compact

[jlahtinen]

Testfiles

$ more .* *

::::::::::::::
.rubocop.yml
::::::::::::::

Style/RaiseArgs:
  EnforcedStyle: compact
AllCops:
  NewCops: enable

::::::::::::::
foo.rb
::::::::::::::

class Foo
  def bar; end

  def bar_bar # rubocop:disable Metrics/MethodLength
    @bars.map do |b|
      begin
        b.foo
      rescue A => e
        e
      end
    end
  end
end

All is fine if bar_bar is first method. So def bar; end is needed.

Running rubocop

$ rubocop -a

warning: parser/current is loading parser/ruby27, which recognizes
warning: 2.7.2-compliant syntax, but you are running 2.7.0.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.
Inspecting 1 file
E

Offenses:

foo.rb:1:1: E: Lint/Syntax: class definition in method body
(Using Ruby 2.4 parser; configure using TargetRubyVersion parameter, under AllCops)
class Foo
^^^^^
foo.rb:1:1: C: Style/Documentation: Missing top-level class documentation comment.
class Foo
^^^^^
foo.rb:1:1: C: [Correctable] Style/FrozenStringLiteralComment: Missing frozen string literal comment.
class Foo
^
foo.rb:4:15: W: [Corrected] Lint/RedundantCopDisableDirective: Unnecessary disabling of Metrics/MethodLength.
  def bar_bar # rubocop:disable Metrics/MethodLength
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
foo.rb:4:19: E: Lint/Syntax: formal argument cannot be an instance variable
(Using Ruby 2.4 parser; configure using TargetRubyVersion parameter, under AllCops)
  def bar_bar     @bars.map do |b|
                  ^^^^^

1 file inspected, 5 offenses detected, 1 offense corrected, 1 more offense can be corrected with `rubocop -A`

Diff between actual result and expected

diff --git a/foo.rb b/foo.rb
index a421fb2..d09747d 100644
--- a/foo.rb
+++ b/foo.rb
@@ -1,7 +1,8 @@
 class Foo
   def bar; end
 
-  def bar_bar     @bars.map do |b|
+  def bar_bar
+    @bars.map do |b|
       begin
         b.foo
       rescue A => e