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Perl one-liner to remove from a text file all lines that contain only whitespace.
Other Ways To Do It (mostly not one-liners) can be found at the thread "How do I remove blank lines from text files?". Hmmm... personally, I like Ovid's example below better than mine. It *does* seem more directly recognizable. perl -i.bak -ne 'print unless /^\s+$/' file.txt
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