Updated: Comment #N
Problem/Motivation
On pages like https://drupal.org/book/export/html/1388470 the string 'Add new comment' is added by the comment module when having a config of COMMENT_FORM_SEPARATE_PAGE.
In #754760: "Add new comment" appears directly above comment form / "post comments" does not work without "access comments" permission this is solved for search_index and search_result but missed the print view mode.
Checking this for Drupal 8 gives similar result but when COMMENT_FORM_BELOW it also prints the whole comment form on the Printer friendly page.
Proposed resolution
Add the filter out for print view mode similar to search_index and search_result.
