Fix the POD of Bug.add_attachment to reflect that it now automatically picks the content_type of text/plain when you set is_patch to true.
Fix the POD of Bug.add_attachment to reflect that it now automatically
picks the content_type of text/plain when you set is_patch to true.

https://bugzilla.mozilla.org/show_bug.cgi?id=633041
dklawren/bugzilla,ikpcdoctor/git-clone---branch-release-5.0-stable-https-git.mozilla.org-bugzilla-bugzilla-,talatdayyan/bugzilla,GNOME/bugzilla-gnome-org-upstream,GNOME/bugzilla-gnome-org-upstream,dylanwh/bugzilla,ikpcdoctor/git-clone---branch-release-5.0-stable-https-git.mozilla.org-bugzilla-bugzilla-,dklawren/bugzilla,talatdayyan/bugzilla,dklawren/bugzilla,dylanwh/bugzilla,oyang/bugzilla,oyang/bugzilla,GNOME/bugzilla-gnome-org-upstream,edmorley/bugzilla,GNOME/bugzilla-gnome-org-upstream,dklawren/bugzilla,oyang/bugzilla,talatdayyan/bugzilla,bugzilla/bugzilla,dklawren/bugzilla,oyang/bugzilla,bugzilla/bugzilla,edmorley/bugzilla,edmorley/bugzilla,dylanwh/bugzilla,talatdayyan/bugzilla,ikpcdoctor/git-clone---branch-release-5.0-stable-https-git.mozilla.org-bugzilla-bugzilla-,bugzilla/bugzilla,dylanwh/bugzilla,edmorley/bugzilla,oyang/bugzilla,GNOME/bugzilla-gnome-org-upstream,dylanwh/bugzilla,ikpcdoctor/git-clone---branch-release-5.0-stable-https-git.mozilla.org-bugzilla-bugzilla-,talatdayyan/bugzilla,ikpcdoctor/git-clone---branch-release-5.0-stable-https-git.mozilla.org-bugzilla-bugzilla-,edmorley/bugzilla,bugzilla/bugzilla