Operator '<<' is deprecated, use '<<=' instead

[torquil]

I get the following warnings when using Matplotlib 1.3.0:

/mn/anatu/cma-u3/tmac/usr/lib64/python2.6/site-packages/matplotlib-1.3.0-py2.6-linux-x86_64.egg/matplotlib/mathtext.py:2182: DeprecationWarning: Operator '<<' is deprecated, use '<<=' instead
float_literal << Regex(r"[-+]?([0-9]+.?[0-9]*|.[0-9]+)")
/mn/anatu/cma-u3/tmac/usr/lib64/python2.6/site-packages/matplotlib-1.3.0-py2.6-linux-x86_64.egg/matplotlib/mathtext.py:2183: DeprecationWarning: Operator '<<' is deprecated, use '<<=' instead
int_literal << Regex("[-+]?[0-9]+")
/mn/anatu/cma-u3/tmac/usr/lib64/python2.6/site-packages/matplotlib-1.3.0-py2.6-linux-x86_64.egg/matplotlib/mathtext.py:2185: DeprecationWarning: Operator '<<' is deprecated, use '<<=' instead
lbrace << Literal('{').suppress()
/mn/anatu/cma-u3/tmac/usr/lib64/python2.6/site-packages/matplotlib-1.3.0-py2.6-linux-x86_64.egg/matplotlib/mathtext.py:2186: DeprecationWarning: Operator '<<' is deprecated, use '<<=' instead
rbrace << Literal('}').suppress()
/mn/anatu/cma-u3/tmac/usr/lib64/python2.6/site-packages/matplotlib-1.3.0-py2.6-linux-x86_64.egg/matplotlib/mathtext.py:2187: DeprecationWarning: Operator '<<' is deprecated, use '<<=' instead
lbracket << Literal('[').suppress()
/mn/anatu/cma-u3/tmac/usr/lib64/python2.6/site-packages/matplotlib-1.3.0-py2.6-linux-x86_64.egg/matplotlib/mathtext.py:2188: DeprecationWarning: Operator '<<' is deprecated, use '<<=' instead
rbracket << Literal(']').suppress()
/mn/anatu/cma-u3/tmac/usr/lib64/python2.6/site-packages/matplotlib-1.3.0-py2.6-linux-x86_64.egg/matplotlib/mathtext.py:2189: DeprecationWarning: Operator '<<' is deprecated, use '<<=' instead
bslash << Literal('')
.
.
.
(the rest are omitted). They are all in mathtext.py

[mdboom]

This has already been fixed in a8d5f96 (and subsequent fixes for even greater compatibility). It will make it into the next bugfix release (1.3.1).