I'm using gedit with DejaVu Sans Mono.
these characters look very bad:
0x2025 TWO DOT LEADER '‥'
0x291e RIGHTWARDS ARROW TO BLACK DIAMOND '⤞'
0x226b MUCH GREATER-THAN '≫'
it seems, that dejavu doesn't provide the glyphs, so gedit switches to VL Gothic Regular. and that looks like crap.
please provide good quality glyphs for those.
was discussed on GNOME bugzilla