fixed a small typo in the clone entry
README: Remove note about indentation. Code should be indented with tabs, the build process converts them to spaces for readability.
.clone(): Remove last example because it deals with rare edge case and can be confusing
Code indentation and formatting (a entries).
Code indentation and formatting (b entries).
Code indentation and formatting (c entries).
Code indentation and formatting (d entries).
Cleanup.
Made minor wording changes.