From an email by Jeffrey Yasskin:

Many functions in the strings clause use formulations like:

[string.cons]/15:

Effects: Same as basic_string(il.begin(), il.end(), a).

[string.capacity]/15:

Effects: Behaves as if the function calls:
erase(begin(), end());

[string::insert]/27:

Effects: insert(p, il.begin(), il.end()).
Returns: [what the above insert() call returns]

instead of the "Equivalent to" wording defined in
[structure.specifications]/4. These should all be changed to
"Equivalent to" for consistency and conciseness.