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$_=join qq#\\\\#,split(/\\/,$_,-1);
>perl -e "my @s=qw(\\\\c\\c\\ d\\d aa bb); for my $x(@s){($y=$x)=~ s#( +\\+)#$1$1#g;print qq{$y=$x;\n}}" \\\\c\\c\\=\\c\c\; d\\d=d\d; aa=aa; bb=bb;