selection-test fails if input file has Windows line ending
Under Windows the file ending depends on the git configuration. If the file ending is Windows (CRLF) for src/gromacs/selection/tests/selfile.dat then several of the selection-test unit tests fail. I see the error both under Cygwin and Linux (where there wouldn't be any good reason to ever have that file with CRLF - just means that one can debug it outside of Cygwin)
Make selections ignore \r in input
Now the selection engine treats \r (as well as various other space
characters) the same as a space. Added a unit test for this.
There is an extra trailing space in some cases that may be more common
with \r\n than otherwise, but that is a separate, mostly cosmetic