old_contents: var hyphenExpression = /\-+([a-z])/gi
  
  function upperCaseFirstMatch (match, c, offset) {
    if (offset !== 0) {
      return c.toUpperCase()
    } else {
      return c
    }
  }
  
  function camelCase (str) {
    var camelCased = str.replace(hyphenExpression, upperCaseFirstMatch)
    hyphenExpression.lastIndex = 0
    return camelCased
  }
  
  module.exports = camelCase
  
new_contents: var hyphenExpression = /-+([a-z])/gi
  
  function upperCaseFirstMatch (match, c, offset) {
    if (offset !== 0) {
      return c.toUpperCase()
    } else {
      return c
    }
  }
  
  function camelCase (str) {
    var camelCased = str.replace(hyphenExpression, upperCaseFirstMatch)
    hyphenExpression.lastIndex = 0
    return camelCased
  }
  
  module.exports = camelCase
  
subject: fix standard error