#!/usr/bin/perl

# http://perlmonks.org/?node_id=1206966

use strict;
use warnings;

print join('', <DATA>) =~ s/^war \V* \K \{ .*? \}/ $& =~ tr|&\n||dr /egmsxr;

__DATA__
some starting text
war eligible, init =0*DEC0, ev (VARIABLE){1*BIN0,2*DEC3,6*BIN4,
& 5*BIN43,6*DEC32,
& 5*BIN43,7*DEC32}
some other text
war wear, init =1*DEC1, ev (VARIABLE) {
& 1*BIN0,2*DEC3,6*BIN4,
& 5*BIN43,6*DEC32,
& 5*BIN43,7*DEC32,6*DEC32,6*DEC3,
& 8*BIN3,6*DEC34
}
some final text