keep floor(i) unchanged if i is imaginary symbol
7961: watch for rounding corner case
Adds line wrapping to Fortran codegen call signatures.

Fortran has a maximum line length of 132 characters. The fcode printer handles
this for the expressions itself, but the call signature failed to wrap if the
number or length of arguments is too large. This fix should deal with most
normal cases.

Fixes issue #7934.
7963: Ray respects 2nd and 3rd quad angles
Merge pull request #7962 from smichr/7961

7961: watch for rounding corner case
Raise TypeError instead of returning False, if we can't sympify 'other'

Unfortunately, we can't use _sympifyit decorator, because in py2 class
instances are compared by object identity ("address") if no other
comparison helpers are defined.

fixes #7833
Use S.Infinity in _infimum_key, if we can't return infimum
Return False if Ellipses don't intersect
use Piecewise for Ray creation from angle
Added field numbers in .format call for Python 2.6 compatibility.
Merge pull request #7967 from MridulS/issue_7939

Return False if Ellipses don't intersect
Merge pull request #7964 from smichr/7963

7963: Ray respects 2nd and 3rd quad angles
Merge pull request #7956 from skirpichev/7833-fix

relational ops: Don't use False as a replacement for 'other', if we can't sympify 'other'
Add Mridul Seth to AUTHORS/aboutus. Welcome to SymPy!
add pi/2 awareness to piecewise of Ray when giving arbitrary angle
Merge pull request #7968 from moorepants/fortran-arg-line-wrap

Adds line wrapping to Fortran codegen call signatures.
Merge pull request #7921 from smichr/real3

keep floor(i) unchanged if i is imaginary symbol
Merge pull request #7979 from smichr/geom

add pi/2 awareness to piecewise of Ray when giving arbitrary angle