code: function(body) {
        switch (body.constructor) {
          case String:
            if (captures = body.match(/^alias (\w+)/)) return JSpec.matchers[last(captures)]
            if (body.length < 4) body = 'actual ' + body + ' expected'
            return { match: function(actual, expected) { return eval(body) }}  
            
          case Function:
            return { match: body }
            
          default:
            return body
        }
      }
docs: Normalize a matcher body
  
  This process allows the following conversions until
  the matcher is in its final normalized hash state.
  
  - '==' becomes 'actual == expected'
  - 'actual == expected' becomes 'return actual == expected'
  - function(actual, expected) { return actual == expected } becomes
  { match : function(actual, expected) { return actual == expected }}
  
  @param  {mixed} body
  @return {hash}
  @api public