[QGIS-Developer] Building pyqgis doc locally

[matteo]

Hi devs,

I've some small ideas to enhance the readthedocs theme of the pyqgis 
documentation and I want make some local test before making a pull request.

I've cloned this repository (around 7GB?!):

https://github.com/qgis/pyqgis

and then I followed the instruction of the Readme file. It seems 
building but it is literally taking ages (./build-docs.sh 
-qgis-build-dir /home/matteo/dev/qgis-master/).

Am I doing something wrong or can I use some shortcut to build it? I'm 
just playing with some css and eventually the config.py.in file.

Cheers and thanks for any advice

Matteo