Update DEVELOPMENT.

DEVELOPMENT.md

@@ -6,24 +6,24 @@
 # Development
 Put those settings inside vimrc,
 ```vim
-let g:LanguageClient_devel = 1 "Use rust debug build
-let g:LanguageClient_loggingLevel = 'DEBUG' "Use highest logging level
+let g:LanguageClient_devel = 1 " Use rust debug build
+let g:LanguageClient_loggingLevel = 'DEBUG' " Use highest logging level
 ```
 
 1. Make necessary changes.
 1. Build. `make` to build, format and run [clippy], or `make build` to run build only.
 1. Verify changes.
-1. Run tests
+1. Run tests. (See below section)
 
 [clippy]: https://github.com/rust-lang-nursery/rust-clippy
 
 # Run tests
-(Option 1) Refer [`Dockerfile`](Dockerfile) to install tests dependencies.
+(Option 1. Recommended) With docker installed,
 ```sh
-make test && make integration-test
+make test && make integration-test-docker
 ```
 
-(Option 2) With docker installed,
+(Option 2) Refer [`Dockerfile`](Dockerfile) to install tests dependencies.
 ```sh
-make test && make integration-test-docker
+make test && make integration-test
 ```