bug : all emacs versions after 2016-02-14 are affected all emacs pretests version are affected including today .93 25.0.92 and 93 are buggy , 25.0.91 is not
this is what : fonts menlo very bad displaying = overlapping vertical line space (and other fonts mono i am told in irc chan )
by eyeballing changelogs i have compiled ii by using src/xftfont.c from pretest 25.0.91 version and it works just fine
scroll down at changelog line reading "2016-02-25" "Remove unneeded workaround in xftfont.c"
i guess it was needed :) compiling .93 and latest git by lamely overwrtiting src/xftfont.c from pretest 25.0.91 fonts menlo are non overlapping anymore all git version i have compiled after 2016-02-14 are affected