8a2251549f
Also, slightly change the shebang fixup in the patchPhase so that it
handles optional [[:space:]] before the interpreter path (needed for the
filters).
To enable the extra filters, put this in packageOverrides:
asciidoc = pkgs.asciidoc.override {
enableDitaaFilter = true;
enableMscgenFilter = true;
enableDiagFilter = true;
};