I have the following input file: 

xabcd a1
+b1
+b2
+b3
+b4
+b5 abcd
xcdef c1
+d1
+d2
+d3
+d4
+cdef

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I am trying to remove all the "+"signs and add the lines together to get output of the following type: 

xabcd a1b1b2b3b4b5 abcd
xcdef c1d1d2d3d4cdef

[download]
Here is my code for this: 
#!/usr/bin/perl
use warnings;
use strict;
use diagnostics;

open my $fh, "<", "$ARGV[0]" or die "Could not open $!";

my @file = <$fh>;
$/ = "\n+";
chomp (@file);
print "@file\n";

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But this gives the output same as the input file. What is wrong with code?

In reply to Chomp in perl by sar123

Title:
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