Add font.glyph_to_string to README.md

[roberto-arista]

No description provided.

[anthrotype]

there seems to be two methods that do the same thing (convert a gid to a glyph name), i.e. hb_font_get_glyph_name and hb_font_glyph_to_string, I wonder why and what's the diff /cc @khaledhosny @behdad

[khaledhosny]

there seems to be two methods that do the same thing (convert a gid to a glyph name), i.e. hb_font_get_glyph_name and hb_font_glyph_to_string, I wonder why and what's the diff /cc @khaledhosny @behdad

hb_font_glyph_to_string() always returns a string and will synthesize a name (gidNNN) if there is no glyph name, while hb_font_get_glyph_name() only returns glyph names if present.

[anthrotype]

ok thanks. So I suppose get_glyph_name() here is appropriate in the README and we can merge this?

[khaledhosny]

For uses like this, font.glyph_to_string() is preferable, as font.get_glyph_name() can return None.

[anthrotype]

right ok, @roberto-arista can you use glyph_to_string() instead? thanks!

[roberto-arista]

done!