Hi monks,
I am working on a bioinformatics web program connected with micro RNAs. As input, the user gives me a list of micro RNAs (miRs), and I recognize miR targets (not relevant to my question, but a bit of background is always nice).
The user interface is written in PHP, and the actual work is done in Perl. The input miRs are saved in an input file, which the Perl program parses and processes.
For the past few days, we have been experiencing a strange bug on some of the input. On closer inspection, it seems that this happened when the input has trailing spaces (see input file below). 
mmu-miR-704 
mmu-miR-219 
mmu-miR-145 
mmu-miR-29b 
mmu-miR-701 
mmu-miR-34a 
mmu-miR-150 
mmu-miR-362 

[download]
However, the strange thing is, that the space in the end is not a space. Every regex I try to delete the space doesn't work. Even more, 
if ($temp =~ /\s/){
    print "Found Space!!\n";
}

[download]
doesn't find anything!
I can use different regexes to try and work around this problem, but I would really like to know what this mysterious character is. Any suggestions?

Thanks, Mr Guy (mrguy123)

The Road goes ever on and on Down from the door where it began.
----Bilbo Baggins

Update: Here is a link to the input. As you can see, a non-core character is indeed at the end of each line. The question is why, and how to get rid of it.

In reply to Something strange in the world or Regexes by mrguy123

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