Merge pull request #1704 from riyad/small-file-edit-fixes

Small fixes for editing files

app/controllers/tree_controller.rb

@@ -8,6 +8,7 @@ class TreeController < ProjectResourceController
   before_filter :require_non_empty_project
   before_filter :assign_ref_vars
+  before_filter :edit_requirements, only: [:edit, :update]
   def show
     @hex_path  = Digest::SHA1.hexdigest(@path)
@@ -34,10 +35,18 @@ class TreeController < ProjectResourceController
     )
     if update_status
-      redirect_to project_tree_path(@project, @id), :notice => "File has been successfully changed"
+      redirect_to project_tree_path(@project, @id), notice: "Your changes have been successfully commited"
     else
-      flash[:notice] = "You can't save file because it has been changed"
+      flash[:notice] = "Your changes could not be commited, because the file has been changed"
       render :edit
     end
   end
+
+  private
+
+  def edit_requirements
+    unless @tree.is_blob? && @tree.text?
+      redirect_to project_tree_path(@project, @id), notice: "You can only edit text files"
+    end
+  end
 end