Info documentation does not match Help documentation

[Raffaele Ricciardi]

Hello there,

I've noticed that the documentation for a symbol in Info mode doesn't 
match the
documentation for the same symbol in Help mode.  I expected both 
documentations
to be the documentation string of the symbol.  Am I missing something?

Compare for instance:

C-h S define-minor-mode RET

With:

C-h f define-minor-mode RET

Or try the same for `thing-at-point'.