my $filename = 'This_filename_has_2  2_spaces.txt';
my $tempstr = "echo \"$filename\" |";
printf "Below is the output of \'$tempstr\'\n";

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It may look like a filename to you, but there's no filename there. All I can see is an "echo" command with a string. From the result printed by echo, the double spaces are turned into a single space. So it seems pretty clear to me that it's the version of `echo` that you have, that causes this.

In reply to Re: consecutive spaces in piped open by bart
in thread consecutive spaces in piped open by Woodya

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