BTW: Use of warnings produces the same unwanted result described in the OP plus a helpful warning (xxx is a text file with whitespace): 

>perl -wMstrict -i.bak -pe 's/\s//g' xxx
Useless use of a constant (s/\s//g) in void context at -e line 1.

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In reply to Re: command line search and replace by AnomalousMonk
in thread command line search and replace by drodinthe559

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