@xref{Electrical Effects, Lightning}, for more info.
which produces
see Lightning for more info.
Yes, that lowercase s should be a capital S (and the comma shouldn't
have been deleted). However, the manual source doesn't have the
incorrect text (and never has, that I recall). I surmise the Info
reader you're using is manipulating the text somehow. FWIW, here's how
it looks in the manual source (texinfo.txi):
@example
@@x...@{electrical Effects, lightn...@}, for more info.
@end example
@noindent
which produces
@example
*Note Lightning: Electrical Effects, for more info.
@end example
@noindent
and
@quotation
See Section 5.2 [Electrical Effects], page 57, for more info.
@end quotation
