considered the case when Xor has same symbol returned false
used multiset so that for odd number of x it will give x and for even no of x false
Fix coverage_doctest.py to work in Python 3
Fix pyflakes warnings in coverage_doctest.py
testcases added and code refined according to PEP8
trailing space removed
Patch for issue #3051. Supports sympification of lambda
Fixed trailing whitespace issue in sympy_parser
Added test case from issue #3051
Fixed PEP8 violations caused by eariler commits
fix docstring of AddWithLimits
Add Aditya Shah to AUTHORS/aboutus. Welcome to SymPy!
setup.py: clean should remove sample.tex
Travis: remove pypy from allow_failures
Merge pull request #2968 from zanzibar7/AddWithLimits_docstring

fix docstring of AddWithLimits
Added args testsand fixed PEP
travis: use versioned archive for theano
Merge pull request #2960 from skirpichev/misc

Misc minor changes
Merge branch 'master' into test_lambda
 Added tests for kwargs and keyword errors