docs: update example summaries

closes #4370

Author: rodion-arr

examples/README.md

@@ -4,21 +4,21 @@ This page contains list of examples using Express.
 
 - [auth](./auth) - Authentication with login and password
 - [content-negotiation](./content-negotiation) - HTTP content negotiation
-- [cookie-sessions](./cookie-sessions) - Working with cookie-based session
+- [cookie-sessions](./cookie-sessions) - Working with cookie-based sessions
 - [cookies](./cookies) - Working with cookies
 - [downloads](./downloads) - Transferring files to client
 - [ejs](./ejs) - Working with Embedded JavaScript templating (ejs)
 - [error-pages](./error-pages) - Creating error pages
 - [error](./error) - Working with error middleware
 - [hello-world](./hello-world) - Simple request handler
 - [markdown](./markdown) - Markdown as template engine
-- [multi-router](./multi-router) - Working with multiple express routers
+- [multi-router](./multi-router) - Working with multiple Express routers
 - [multipart](./multipart) - Accepting multipart-encoded forms
-- [mvc](./mvc) - MVC style controllers
+- [mvc](./mvc) - MVC-style controllers
 - [online](./online) - Tracking online user activity with `online` and `redis` packages
 - [params](./params) - Working with route parameters
 - [resource](./resource) - Multiple HTTP operations on the same resource
-- [route-map](./route-map) - Organizing routes using map
+- [route-map](./route-map) - Organizing routes using a map
 - [route-middleware](./route-middleware) - Working with route middleware
 - [route-separation](./route-separation) - Organizing routes per each resource
 - [search](./search) - Search API