Uglify-JS Error: Unexpected character '' when concatenating then minifying select2
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I am concatenting [select2](http://ivaynberg.github.com/select2/) to my other javascript files like so:

    cat scripts/jquery-timeago.js scripts/jquery-autosize.js scripts/select2.js > public/vendors.js
    uglifyjs -nc -o public/vendors.min.js public/vendors.js

However, I found an issue where there would be an empty whitespace character prepended right before `select2` only after concatenation, which then causes a parsing error in UglifyJS. If I go to the beginning of where `select2` starts in the concatenated file and press backspace, an empty character is deleted and minification works fine. 

What is going on? How can I fix this?