question: void fixWhiteSpace ( ) { final int index = mOutputBuilder . length ( ) - 1 ; if ( index >= 0 ) { final char lastCharacter = mOutputBuilder . charAt ( index ) ; if ( ! Character . isWhitespace ( lastCharacter ) ) { mOutputBuilder . append ( " " ) ; } } }
target:  Ensure the output string has a character of whitespace before adding another word.