Merge branch 'style/enable-rubocop-end-of-line-cop' into 'master'

Enable Style/EndOfLine Rubocop style cop

Use Unix-style line endings.

Removed carriage return character from end of each line in `app/controllers/projects/find_file_controller.rb`

See #17478

See merge request !4347

.rubocop.yml

@@ -222,7 +222,7 @@ Style/EndBlock:
 
 # Use Unix-style line endings.
 Style/EndOfLine:
-  Enabled: false
+  Enabled: true
 
 # Favor the use of Fixnum#even? && Fixnum#odd?
 Style/EvenOdd: