pastebin shell syntax bug

#!/bin/sh
# the following is completely valid shell syntax

## bug: quoted subshells ##

# broken up, this line is fine
# (well, not really, but at least its errors are self-contained)
temp="$(
    mktemp -t "$(
        basename -- "$0"
    ).XXXXXX"
)"

# but on a single line, it fucks up pastebin's syntax highlighting
temp="$(mktemp -t "$(basename -- "$0").XXXXXX")"
# see what I mean?
# well?

# it only thinks it's outside a quoted string when I use a double quote --> "
# now it's fine