Fix routing issues when navigating over tree, commits etc

app/helpers/commits_helper.rb

@@ -70,4 +70,12 @@ module CommitsHelper
       escape_javascript(render 'commits/commit', commit: commit)
     end
   end
+
+  def diff_line_content(line)
+    if line.blank?
+      "  "
+    else
+      line
+    end
+  end
 end

app/models/project.rb

@@ -102,7 +102,7 @@ class Project < ActiveRecord::Base
       if id.include?("/")
         id = id.split("/")
         namespace_id = Namespace.find_by_path(id.first).id
-        where(namespace_id: namespace_id).find_by_path(id.last)
+        where(namespace_id: namespace_id).find_by_path(id.second)
       else
         where(path: id, namespace_id: nil).last
       end

app/views/commits/_text_file.html.haml

@@ -15,7 +15,7 @@
           - if @comments_allowed
             = render "notes/per_line_note_link", line_code: line_code
         %td.new_line= link_to raw(type == "old" ? " " : line_new) , "##{line_code}", id: line_code
-        %td.line_content{class: "noteable_line #{type} #{line_code}", "line_code" => line_code}= raw "#{line}  "
+        %td.line_content{class: "noteable_line #{type} #{line_code}", "line_code" => line_code}= raw diff_line_content(line)
 
         - if @comments_allowed
           - comments = @line_notes.select { |n| n.line_code == line_code }.sort_by(&:created_at)