minor doc fixes

[FabianHofmann]

Closes #160

Change proposed in this Pull Request

Some spelling and duplication fixes in the doc

[euronion]

Looking mostly good.

The sections for the example might need some additional adjustment but I can't check it locally.

[FabianHofmann]

I checked it, looks fine now, otherwise we'll tackle it in a another pr

[euronion]

I just checked. There is now a weird behaviour:

If you jump to RTD everything looks fine at first. Then select "Histroic comparison PV and wind" and the sidebar will change, new menus appear and the selected menu will be renamed to include "... (Germany)".
Select another example and the sidebar returns to normal. :/

[FabianHofmann]

mmh, I cannot reproduce. Maybe some "intelligent" cookies which loaded the old style?
when i have the section selected like here https://atlite.readthedocs.io/en/master/examples/historic-comparison-germany.html everything seems to be fine.

[fneum]

mmh, I cannot reproduce. Maybe some "intelligent" cookies which loaded the old style?
when i have the section selected like here https://atlite.readthedocs.io/en/master/examples/historic-comparison-germany.html everything seems to be fine.

Yes, delete and rebuild locally

[euronion]

Ah yes. That did the trick. Thanks.