Fix git installation instructions
MODIFY
README.md
README.md
@@ -51,6 +51,7 @@ Alternatively, you can grab the latest source code from [GitHub](https://github.
```bash
$ git clone https://github.com/urllib3/urllib3.git
+$ cd urllib3
$ pip install .
```

MODIFY
docs/index.rst
docs/index.rst
@@ -87,6 +87,7 @@ Alternatively, you can grab the latest source code from `GitHub <https://github.
.. code-block:: bash
$ git clone https://github.com/urllib3/urllib3.git
+ $ cd urllib3
$ pip install .
Usage

Fix git installation instructions (#2587)