I prefer this dark theme for powercli scipts and editing config files.
Full info about the theme – https://github.com/SeanCline/Npp-VS2012-Dark

1. Download VS2012-Dark.xml  (right-click save as)
   https://raw.githubusercontent.com/SeanCline/Npp-VS2012-Dark/master/VS2012-Dark.xml
   
2. Place the VS2012-Dark.xml into the “theme” sub-folder of where NPP is installed/extracted.
   Ex.   C:Program Files (x86)Notepad++themes
   You can create the “themes” sub-folder if the folder is not there.
3. Open NPP, Click “Settings” and “Style Configuration”
4. Select “VS2012-Dark”.    I prefer the Consolas font, Bold and 12.

To help prevent a bad copy/paste.
ex. adding to the c:ProgramDataVMwareVMware VirtualCentervpxd.cfg file

• Click View / Show Symbol / Show White Space and TAB

You can see line 10 has 1 tab (arrow) before the test while lines 11-15 have 2 tabs.
If there were spaces, there would be a tiny dot per space.