Remove Index fossil

S32-setting-library/Str.pod

@@ -177,11 +177,10 @@ the other normalization forms, convert the C<Str> to the appropriate type first.
 C<index> searches for the first occurrence of C<$substring> in C<$string>,
 starting at C<$pos>.
 
-If the substring is found, then the C<Index> returned represents the position
-of the first character of the substring (which is True even if C<0>). If the
-substring is not found, C<Nil> is returned.  This really a kind of undefined
-value.  Do not evaluate it as a number, because that will assume <0> and
-issue a warning.
+If the substring is found, then the value returned represents the position
+of the first character of the substring. If the substring is not found,
+C<Nil> is returned.  Do not evaluate it as a number, because that will
+assume <0> and issue a warning.
 
 [Note: if C<$substring> is not of the same string type as C<$string>, should
 that cause an error, or should C<$substring> be converted to C<$string>'s type?]