Log Message:
textproc/ruby-haml: update to 5.2.1

5.2.1 (2020-11-30)

* Add in improved "multiline" support for attributes #1043

5.2 (2020-09-28)

* Fix crash in the attribute optimizer when #inspect is overridden in
  TrueClass / FalseClass #972
* Do not HTML-escape templates that are declared to be plaintext #1014
  (Thanks @cesarizu)
* Class names are no longer ordered alphabetically, and now follow a new
  specification as laid out in REFERENCE #306