[HarfBuzz] Don't render control characters?

[Richard Wordingham]

On Wed, 05 Mar 2014 15:04:30 -0800
Behdad Esfahbod <behdad at behdad.org> wrote:

> Any objection to not rendering Unicode GC=Cc, same way that we don't
> render Default_Ignorables?

I'm not sure that BS (U+0008) and TAB (U+0009) don't need to be
rendered.  I can imagine a terminal emulator wanting BS for
overstriking, and having no spacing for TAB is suboptimal.  TAB can
easily get into text to be rendered.

Richard.