Funny. I've been using this little script, which I named simply "wrap", for ... uh ... well, years now that I think about it. It's a wrapper around Text::Wrap's wrap() function. If I recall, I wrote it because I wanted to be able to use the "initial_tab" and "subsequent_tabs" feature of Text::Wrap. It only outputs to stdout. I generally call it from vi and haven't needed to write the output directly to a file, but if I ever do there's always redirection.

#!/usr/bin/perl -w
use strict;
# Description: Text wrapper kind of like fmt.

use Getopt::Std;
use Text::Wrap;

my $USAGE =<<EOU;
$0: [-c columns] [-i initial_tab] [-s subsequent_tabs] [-h] file ...
-c    Set column width for wrapping.
-i    Set initial 'tab' string for first paragraph line.
-s    Set a 'tab' string for subsequent paragraph lines.
EOU

local $/ = '';

my %O;
getopts("c:i:s:h", \%O);
if ($O{'h'}) {
        print $USAGE;
        exit;
}

$Text::Wrap::columns = $O{'c'} || 80;
my $inittab = exists $O{'i'} ? eval("qq($O{'i'})") : '';
my $subtabs = exists $O{'s'} ? eval("qq($O{'s'})") : '';

while (<>) {
        s/\n/ /g; $_ .= "\n\n";
        print Text::Wrap::wrap($inittab, $subtabs, $_);
}
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-sauoq
"My two cents aren't worth a dime.";