Ok thank you! So tr does not do all regexp metachars such as \d \D \s 
+\S \w \W?

is \s+ is whitespace, why didn't s/^\s+|\s+$//g work on these empty li
+nes?

So \S is non-whitespace so essentially it is ???

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In reply to Re^2: removing empty lines by mikejones
in thread removing empty lines by mikejones

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