Another strange error with data URLs: + changed to space

[mcvsama]

Less code:

.abc { background: url('data:image/png;base64,w8P+ivf') repeat-x scroll 0 0; }

compiles to:

.abc { background: url('data:image/png;base64,w8P ivf') repeat-x scroll 0 0; }

which breaks MIME encoding. Adding '' or "" doesn't help.

Less version: 1.2.17, Ruby: 1.8.7.