Sentence:  ... but it also reduces the likelihood of the "unterminated string literal" error message that can easily occur for seemingly trivial reasons when you're working with long strings — an accidental <WSD>carriage return</WSD> or a misnested quotation mark is all it takes. 
Meaning of the word marked with <WSD> tags:  The control character (0x0D in ASCII, abbreviated as CR) that originally signaled a device to perform a carriage return, but now merely indicates the end of a line of text.