« is garbled when rendering as png

[tmtk75]

This issue depends on phantomjs, https://github.com/ariya/phantomjs

To reproduce this issue, please follow next instruction on the branch, 7a8ff63

$  npm install
$ ./node_modules/phantomjs2/bin/phantomjs a.js

Open a generated a.png with your browser. You'll see as follow.

Versions:

• MacOSX 10.10.4
• PhantomJS 2.0.0 installed with npm

[tmtk75]

a workaround: 8ff578f
to remove garbled characters.