[PATCH 0 of 1] tests: fix sed expression for BSD sed

[David Champion]

* On 01 May 2010, Christian Ebert wrote: 
> >>> BSD sed expects a newline right after '\' in expressions like
> >>> 
> >>> Wrapping the line right after '\' fixes the test-keyword test on FreeBSD
> >>> here:
> > 
> > FWIW none of them works on Solaris:
> 
> Thanks. I'm gonna propose a fix, probably in python.

Sed is a bundle of nonportability, but basic awk/nawk is generally quite
portable.

awk '{print} NR==1 {print "foo"}' a >a.tmp

Tested on OSX (BSD awk), Linux (GNU awk), and OpenSolaris (System V
awk).

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