How do I get spaces instead of tabs in nano?
Either create .nanorc in your home folder, including:
set tabsize 4
set tabstospaces
or edit the system /etc/nanorc file.
From the nano Command Manual:
-E, --tabstospacesConvert typed tabs to spaces.
-T <#cols>, --tabsize=<#cols>Set the displayed tab length to #cols columns. The value of #cols must be greater than 0. The default value is 8.
For four spaces, the appropriate command would therefore be nano -ET4.
Consider creating a permanent alias.