Merge branch 'commits_statistic' into 'master'

Commits statistic grammar

Fixes #2089

Changed spelling from Commits statistic to Commit statistics

See merge request !1625

app/views/projects/graphs/commits.html.haml

 = render 'head'
 
 %p.lead
-  Commits statistic for
+  Commit statistics for
   %strong #{@repository.root_ref}
   #{@commits_graph.start_date.strftime('%b %d')} - #{@commits_graph.end_date.strftime('%b %d')}
 

features/steps/project/graph.rb

@@ -17,7 +17,7 @@ class Spinach::Features::ProjectGraph < Spinach::FeatureSteps
   end
 
   step 'page should have commits graphs' do
-    page.should have_content "Commits statistic for master"
+    page.should have_content "Commit statistics for master"
     page.should have_content "Commits per day of month"
   end
 end