code refactor as per standards

app/controllers/profiles/keys_controller.rb

@@ -34,14 +34,17 @@ class Profiles::KeysController < ApplicationController
     end
   end
-  #get all keys of a user(params[:username]) in a text format
-  #helpful for sysadmins to put in respective servers
+  # Get all keys of a user(params[:username]) in a text format
+  # Helpful for sysadmins to put in respective servers
   def get_keys
     if params[:username].present?
       begin
         user = User.find_by_username(params[:username])
-        user.present? ? (render :text => user.all_ssh_keys.join('\n')) :
-          (render_404 and return)
+        if user.present?
+          render text: user.all_ssh_keys.join('\n')
+        else
+          render_404 and return
+        end
       rescue => e
         render text: e.message
       end

app/models/user.rb

@@ -437,6 +437,6 @@ class User < ActiveRecord::Base
   end
   def all_ssh_keys
-    keys.collect{|x| x.key}.join("\n")
+    keys.map(&:key)
   end
 end

config/routes.rb

@@ -12,7 +12,7 @@ Gitlab::Application.routes.draw do
   API::API.logger Rails.logger
   mount API::API => '/api'
-  #get all keys of user
+  # Get all keys of user
   get ':username.keys' => 'profiles/keys#get_keys' , constraints: { username: /.*/ }
   constraint = lambda { |request| request.env["warden"].authenticate? and request.env['warden'].user.admin? }