Updates:
        Summary: Fix evalf documentation
        Cc: smi...@gmail.com
        Labels: -smichr -NeedsReview Documentation EasyToFix

Comment #3 on issue 2842 by asmeu...@gmail.com: Fix evalf documentation
http://code.google.com/p/sympy/issues/detail?id=2842

That pull request was merged, but we should also fix that documentation issue as well. With the pull request merged, we now get:

In [58]: (S(1)/(Symbol('n')+1)).evalf()
Out[58]:
   1
───────
n + 1.0

evalf() *doesn't* return the original expression unchanged. It returns it with the numerical parts evalf'd.

The use of 1.0 vs. 1 seems to be inconsistant by the way. Shouldn't that give 1.0/(n + 1.0)?

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