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rsync

#!/usr/bin/perl -i -p

use strict;
use warnings;

# We only need to use "\&'" or "\&." at the start of a line.
s/(?<=.)\\\&(['.])/$1/g;

# Some quotes turn into open/close quotes.
s/'(.)'/\\(oq$1\\(cq/g;
s/(^|[ (])"(?!( |$))/$1\\(lq/gm;
s/(?<! )"([.,:;! )]|$)/\\(rq$1/gm;
s/(\\\(lq[^(]*) "( |$)/$1 \\(rq$2/gm;
s/(^| )" ([^(]*\\\(rq)/$1\\(lq $2/gm;

# And some don't.
s/^([. ])(.*)/ $1 . realquotes($2) /egm;
s/(\\f(B|\(CW).*?\\fP)/ realquotes($1) /egs;

s/^\\\&(\\\(oq)/$1/gm;

sub realquotes
{
    my($txt) = @_;
    $txt =~ s/\\\([lr]q/"/g;
    $txt =~ s/\\\([oc]q/'/g;
    $txt;
}