Fix query ? in mathjax script path (#1706)

lib/gollum/views/layout.rb

@@ -47,7 +47,7 @@ module Precious
       end
 
       def mathjax_js
-        page_route("gollum/assets/mathjax/MathJax.js?config=TeX-AMS-MML_HTMLorMML")
+        "#{page_route('gollum/assets/mathjax/MathJax.js')}?config=TeX-AMS-MML_HTMLorMML"
       end
 
       def css # custom css

test/test_app.rb

@@ -953,7 +953,7 @@ context 'Frontend with base path' do
   test 'base path mathjax assets' do
     get '/wiki/Home'
     assert last_response.ok?
-    assert last_response.body.include?('<script defer src="/wiki/gollum/assets/mathjax/MathJax.js')
+    assert last_response.body.include?('<script defer src="/wiki/gollum/assets/mathjax/MathJax.js?config=')
   end
   
   test 'compare view' do