[lldb][docs] Fix some RST formatting errors related to code examples.

Mostly just making sure the indentation is right (SBDebugger had 0 spaces
as it was still plain text, the others had too much indentation or other
minor issues).

GitOrigin-RevId: 7e9e6ac526ebd90fe8ec0b8d2bb6edd3516ab908
6 files changed