Trimming strings

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Getting rid of leading and trailing white space in a string is called "trimming." Trimming strings is often helpful when you work with input from a user of your program.

Called on: the string to be trimmed

Arguments: None

Returns: the string without beginning or trailing white space

Example

String trueSentence = " I have extra spaces! ";
falseSentence = trueSentence.trim();             // "I have extra spaces!";

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