Some tests pipe the stdout and stderr of the compiler or assembler into
a file and compare the result with a reference. This has the subtle
problem that both stdout and stderr and buffered i/o streams that may or
may not work the same on different OSs or even shells. That means the
order of the lines in the resulting file is not guaranteed.
In practise it is "mostly" not an issue, but "we" still stumbled about
one test where different behaviour can be triggered depending on running
it in cmd.exe or bash (msys): test/asm/listing output of
010-paramcount.bin differs from the reference output when running the
test from cmd.exe.
The solution is most likely to have two reference files and not redirect
into one file.
This patch fixes the issue (cf. #1912) for the directory test/asm/.
add ref/ and control/ subdirectories, so the control files and result
files do not clutter the directory, and it is clear which file has which
purpose.
isequal: New option --skip as a shortcut for --skipleft and --skipright
at once.
Use that for the .list-ref files, so they now contain the first line of
the output, too, which is ignored.
--binary: handled binary files
--empty: check if file is empty
--skipleft=<n>: Skip <n> lines at the start of the left (first) file
--skipright=<n>: Skip <n> lines at the start of the right (second) file
Note that --binary, --empty and one or both of --skipXXX are mutual
exclusive; that is, you cannot specify more than one of them at the same
time, or the behaviour will be unpredictable.
