Perhaps this will do what you want to do? 
use strict;
use warnings;

while (my $line = <DATA>) {
   if ($line =~ /CLI/) {
      chomp $line;
      while (my $line2 = <DATA>) {
         next unless $line2 =~ /\S/;  # ignore blank lines
         $line .= " $line2";
         last;
      }
   }
   print $line;
}

__END__
MVC   DOWO(8),WCPA   
                    
CLI   WCPA+2,C'.'  
                      
BNE   UPCC22

[download]
which prints 
bash-3.2$ perl suno.pl
MVC   DOWO(8),WCPA   
                    
CLI   WCPA+2,C'.'   BNE   UPCC22     
bash-3.2$

[download]

In reply to Re^4: chomp question by ramlight
in thread chomp question by suno

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