Fix few typos in QA selectors validation code

qa/qa/page/view.rb

@@ -9,7 +9,7 @@ module QA
       end
 
       def pathname
-        @pathname ||= Pathname.new(File.join( __dir__, '../../../', @path))
+        @pathname ||= Pathname.new(File.join(__dir__, '../../../', @path))
           .cleanpath.expand_path
       end
 

qa/spec/page/validator_spec.rb

@@ -4,7 +4,7 @@ describe QA::Page::Validator do
       described_class.new(QA::Page::Project)
     end
 
-    it 'returns all costants that are module children' do
+    it 'returns all constants that are module children' do
       expect(subject.constants)
         .to include QA::Page::Project::New, QA::Page::Project::Settings
     end