LeFrog, 10 months ago I think your link has a double encoded % at the end: %25 The correct link is https://en.cppreference.com/w/cpp/string/basic_string/operator2B
I think your link has a double encoded % at the end: %25
%
%25
The correct link is https://en.cppreference.com/w/cpp/string/basic_string/operator2B