[DL]String additions to 'devhelp.main'

[GNOME Status Pages <noreply gnome org>]

This is an automatic notification from status generation scripts on:
https://l10n.gnome.org.

There have been following string additions to module 'devhelp.main':

+ "Devhelp supports HTML documentation formats"
    + "Devhelp supports opening multiple books"
    + "Devhelp's main window with an open book"
    + "Devhelp's main window"

Note that this doesn't directly indicate a string freeze break, but it
might be worth investigating.
https://gitlab.gnome.org/GNOME/devhelp/commits/main