[teddyh]

“Compose--.” produces an en dash, not an em dash. An em dash is produced by “Compose---”.

Source:

  grep -e DASH /usr/share/X11/locale/*/Compose

[mock-possum]

As it should be. I wish this convention were present across more software, “-“ “- -“ and “- - -“ should be the UI norm for entering proper dashes in text input controls.

[WhyNotHugo]

Most software handles this fine if you configure your compositor to use a compose key.

[fao_]

Whoops, yep that's the one