Add rubocop to our build. (#5004)

lib/suggested_topics_builder.rb

@@ -11,15 +11,14 @@ class SuggestedTopicsBuilder
     @results = []
   end
 
-
-  def add_results(results, priority=:low)
+  def add_results(results, priority = :low)
 
     # WARNING .blank? will execute an Active Record query
     return unless results
 
     # Only add results if we don't have those topic ids already
     results = results.where('topics.id NOT IN (?)', @excluded_topic_ids)
-                     .where(visible: true)
+      .where(visible: true)
 
     # If limit suggested to category is enabled, restrict to that category
     if @category_id && SiteSetting.limit_suggested_to_category?
@@ -29,8 +28,8 @@ class SuggestedTopicsBuilder
 
     unless results.empty?
       # Keep track of the ids we've added
-      @excluded_topic_ids.concat results.map {|r| r.id}
-      splice_results(results,priority)
+      @excluded_topic_ids.concat results.map { |r| r.id }
+      splice_results(results, priority)
     end
   end
 
@@ -40,7 +39,7 @@ class SuggestedTopicsBuilder
       # Topics from category @category_id need to be first in the list, all others after.
 
       other_category_index = @results.index { |r| r.category_id != @category_id }
-      category_results, other_category_results = results.partition{ |r| r.category_id == @category_id }
+      category_results, other_category_results = results.partition { |r| r.category_id == @category_id }
 
       if other_category_index
         @results.insert other_category_index, *category_results
@@ -66,7 +65,7 @@ class SuggestedTopicsBuilder
   end
 
   def category_results_left
-    SiteSetting.suggested_topics - @results.count{|r| r.category_id == @category_id}
+    SiteSetting.suggested_topics - @results.count { |r| r.category_id == @category_id }
   end
 
   def size