function hasLeftWordBreakAtIndex(text, index) {
    if (index === 0) {
      return true;
    } else {
      return !isWordChar(text[index - 1]) && isWordChar(text[index]);
    }
  }
Checks if char to the left of {index} in {string}
is a break (non-char).

@param {string} text
@param {number} index
@returns {boolean}
@private