Fix bug for init option

Author: gazay

gon.gemspec

@@ -24,4 +24,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rspec"
   s.add_development_dependency "jbuilder"
   s.add_development_dependency "rake"
+  s.add_development_dependency "debugger"
 end

lib/gon/request.rb

@@ -24,7 +24,7 @@ def gon
       end
 
       def clear
-        env && (env[:gon] = {})
+        env && (env['gon'] = {})
       end
 
     end

spec/gon/basic_spec.rb

@@ -79,6 +79,14 @@
                                   'gon.int=1;'
     end
 
+    it 'outputs correct js without variables, without tag and gon init if before there was data' do
+      Gon::Request.
+        instance_variable_set(:@request_id, 123)
+      Gon::Request.instance_variable_set(:@request_env, { 'gon' => { :a => 1 } })
+      @base.include_gon(need_tag: false, init: true).should == \
+                                  'window.gon = {};'
+    end
+
     it 'outputs correct js without variables, without tag and gon init' do
       @base.include_gon(need_tag: false, init: true).should == \
                                   'window.gon = {};'