Idiomatic portable way to strip line endings?

[Erik Max Francis]

Skip Montanaro wrote:

> I suspect the high frequency of
> 
>     line = line[:-1]
> 
> simply means that most people haven't worried too much about their
> code
> running across multiple platforms.  I know for most of the code I've
> written
> I've never worried too much about it.

Not sure what the issue here is.  When a file is opened in text mode, as
I'd expect, looks like line endings on different platforms are
normalized to just one newline (presumably because Python is implemented
in C where this is true as well).

I just tested

	sys.stdin.readline()

and it indeed does _not_ have a trailing CR LF, just a trailing LF as
I'd expect.  So what's the issue here?

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