Small wtf moment today. I forgot to instantiate / give a String variable a default value. After appending the string and tracing it, "null" was the first part that showed, see below:
CODE:
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var test:String;
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test += "Test 1, 2, 3, 4...";
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trace(test);
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// output: "nullTest 1, 2, 3, 4..."
Fix:
CODE:
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var test:String = "";
Oops! 
