Anonymous committed 09a8baa

Use b() so that the regex is a bytestring

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 from sphinx.errors import SphinxError
 from sphinx.util.png import read_png_depth, write_png_depth
 from sphinx.util.osutil import ensuredir, ENOENT
+from sphinx.util.pycompat import b
 from sphinx.ext.mathbase import setup_math as mathbase_setup, wrap_displaymath
 class MathExtError(SphinxError):
-depth_re = re.compile(r'\[\d+ depth=(-?\d+)\]')
+depth_re = re.compile(b(r'\[\d+ depth=(-?\d+)\]'))
 def render_math(self, math):
     """Render the LaTeX math expression *math* using latex and dvipng.