Than maybe two simple one-liners?

perl -ple's/^line\d+=//' infile | perl -p0e 's!\n!/!g' > outfile

[download]
or 
perl -ple's/^line\d+=//' infile | perl -p0e 's!\s+$!! ; s!\n!/!g' > ou
+tfile

[download]
if end of the output has any meaning. Hmm, seems there is no beauty, too.

In reply to Re^2: how to delete part of the line? by grizzley
in thread how to delete part of the line? by yskmonk

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