Merge pull request #404 from mrakitin/doc_update_config_instructions

DOC: update installation/configuration instructions

README.md

@@ -107,14 +107,13 @@ fi
 - Clone this repository to your home directory.
 
 ```sh
-cd ~
+git clone https://github.com/magicmonty/bash-git-prompt.git ~/.bash-git-prompt --depth=1
-git clone https://github.com/magicmonty/bash-git-prompt.git .bash-git-prompt --depth=1
 ```
 
 Add to the `~/.bashrc`:
 ```
-  GIT_PROMPT_ONLY_IN_REPO=1
+GIT_PROMPT_ONLY_IN_REPO=1
-  source ~/.bash-git-prompt/gitprompt.sh
+source ~/.bash-git-prompt/gitprompt.sh
 ```
 
 ### install for the fish shell