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If all you care about is printing it out, you don't have to accumulate the lines before printing. Just print out the partial lines (without line endings).

If the input to your existing code may be broken up in multiple lines via backslash \, just filter the input first before it gets sucked in by your existing code:
perl -pe 's=\s*\\\s*$/= ='

In reply to Re: Reading a text file collapsing line continuations by repellent
in thread Reading a text file collapsing line continuations by skx

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