Add missing end of verbatim section.
https://www.tensorflow.org/install/install_sources
### Install Python 2 or Python 3 (recommended)
-```
+```bash
$ sudo apt-get install libcupti-dev
$ sudo apt-get install python-dev python-pip python-wheel
+```
### Install Python packages (in user-space)
-```
+```bash
$ python -m pip install numpy --user
$ python -m pip install gast --user
$ python -m pip install astor --user
@@ -22,7 +23,6 @@ $ python -m pip install keras_preprocessing==1.0.2 --no-deps --user
To prevent running out of memory during a build, restrict the build to use
e.g. 1 processor:
-
-```
+```bash
$ ck install package:lib-tensorflow-1.13.1-src-cpu --env.CK_HOST_CPU_NUMBER_OF_PROCESSORS=1
```
