Hi,
In section 3.3 (The s Command), we are told that both upper-case and
lower-case `i' match provided regular expressions in a case-insensitive
manner. However, in section 4.3 (selecting lines by text matching), we are
told that lower-case `i' is reserved for the insert command.

The lower-case `i' needs to be removed from section 3.3.

Best wishes,
Gavin Rebeiro