Merge pull request #976 from whatasunnyday/whitespace

Remove extra whitespace.

Author: dblock

lib/grape/error_formatter/json.rb

@@ -5,7 +5,7 @@ class << self
         def call(message, backtrace, options = {}, env = nil)
           message = Grape::ErrorFormatter::Base.present(message, env)
 
-          result = message.is_a?(String) ?  { error: message } : message
+          result = message.is_a?(String) ? { error: message } : message
           if (options[:rescue_options] || {})[:backtrace] && backtrace && !backtrace.empty?
             result = result.merge(backtrace: backtrace)
           end