Merge pull request matplotlib#3076 from mdboom/russian

Bug: backend_pdf: UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2

Author: tacaswell

lib/matplotlib/backends/backend_pdf.py

@@ -1822,7 +1822,8 @@ def draw_tex(self, gc, x, y, s, prop, angle, ismath='TeX!', mtext=None):
                 oldfont = dvifont
             # We need to convert the glyph numbers to bytes, and the easiest
             # way to do this on both Python 2 and 3 is .encode('latin-1')
-            seq += [['text', x1, y1, [chr(glyph).encode('latin-1')], x1+width]]
+            seq += [['text', x1, y1,
+                     [six.unichr(glyph).encode('latin-1')], x1+width]]
 
         # Find consecutive text strings with constant y coordinate and
         # combine into a sequence of strings and kerns, or just one