In coq mode I have ligatures being used: instead of "fun", it shows λ in the programming code. But in the comments lambda transformed into a character I can't even copy, so I'll attach a screenshot:
Something is wrong with the glyph. What font should I set to get lambda everywhere?
coq-mode
. It just usesfont-lock-mode
with syntactic highlighting andpretttify-symbols-mode
. The face you are looking for should befont-lock-comment-face
. Maybe, it is customized.C-u C-x =
to show all the details about it. It'll tell you the name of the character as well as what font it used to draw it.