[#93FFB9C8935F0CD50E7C0BDD1FE0EF4DBDDA7A6B]
Append a segment
void push_back(pct_string_view s);
This function appends a segment to the end of the path. Reserved characters in the string are automatically escaped. Escapes in the string are preserved.
All end iterators are invalidated.
this->back() == s
Strong guarantee. Calls to allocate may throw. Exceptions thrown on invalid input.