Need a cop to enforce disabling comment syntax

[knutsenm]

Is your feature request related to a problem? Please describe.

Lint/RedundantCopDisableDirective autocorrect can cause a syntax error if it removes a disabling comment that is followed by extra text:

% cat test4.rb 
# frozen_string_literal: true

puts 'Hello, world!' # rubocop:disable Cop/DNE - does not exist

% ruby test4.rb
Hello, world!

% rubocop --autocorrect test4.rb
Inspecting 1 file
E

Offenses:

test4.rb:3:22: W: [Corrected] Lint/RedundantCopDisableDirective: Unnecessary disabling of Cop/DNE (unknown cop).
puts 'Hello, world!' # rubocop:disable Cop/DNE - does not exist
                     ^^^^^^^^^^^^^^^^^^^^^^^^^
test4.rb:3:28: E: Lint/Syntax: unexpected token kNOT
(Using Ruby 3.0 parser; configure using TargetRubyVersion parameter, under AllCops)
puts 'Hello, world!'- does not exist
                           ^^^

1 file inspected, 2 offenses detected, 1 offense corrected

% cat test4.rb 
# frozen_string_literal: true

puts 'Hello, world!'- does not exist

% rubocop -V
1.36.0 (using Parser 3.1.2.1, rubocop-ast 1.21.0, running on ruby 3.0.4) [x86_64-darwin21]

Describe the solution you'd like

The docs do say

Do not write anything other than cop name in the disabling comment.

but since there is the potential to cause a syntax error on autocorrect that is supposed to be safe, perhaps there should be a cop to enforce that?

Alternatively, autocorrect could remove the entire comment line beginning with the directive; that would be safe.

Or, autocorrect could retain the # when comment text remains. There is something of a precedent for this: #9823 allows a comment to precede the directive.

Describe alternatives you've considered

See above.

Additional context

See above.

[knutsenm]

Love it; thanks!