et also <tt>s</tt> be a <tt>std::basic_string&lt;Char, Traits&gt;</tt>
object, having length <tt>b.size()</tt> and such as, for each <tt>i</tt>
in <tt>[0, b.size())</tt>,

 <tt>s[i] is character_of(b[i])</tt>

Then, the output, the effects on <tt>os</tt> and the exception behavior
is the same as outputting the object <tt>s</tt> to <tt>os</tt> (same
width, same exception mask, same padding, same setstate() logic)
<br />
<b>Returns:</b> os <br />
<b>Throws:</b> <tt>std::ios_base::failure</tt> if there is a
pr