$ comrak -e header-attributes
# Hi! {#greeting}
$ comrak -e header-attributes
## Catgirl {author="City Girl"}
$ comrak -e header-attributes
## Yeww {.ok yeww="\"true\""} ##
$ comrak -e header-attributes
## Yeww ## {x=y x=y #a #b}
$ comrak -e header-attributes
Yeww {x=y x=y #a #b}
====================
$ comrak -e header-attributes --attributes --unsafe
# Hi! {#greeting}
$ comrak -e header-attributes --attributes --unsafe
## Yeww {.ok yeww="\"true\""} ##
$ comrak -e header-attributes --attributes --unsafe
## Yeww ## {x=y x=y #a #b}
$ comrak -e header-attributes --header-id-prefix user-content- --attributes --unsafe
# Hi! {#greeting .wave}
# Hi!
$ comrak -e header-attributes --header-id-prefix user-content- --attributes --unsafe
# Hi!
# Hi! {#hi}
# Hi!