I am reading Bjarne Stroustrup's Programming : Principles and Practice Using C++

In the drill section for Chapter 2 it talks about various ways to look at typing errors when compiling the hello_world program

#include "std_lib_facilities.h"

int main()  //C++ programs start by executing the function main
{
    cout << "Hello, World!\n",  // output "Hello, World!"
    keep_window_open();         // wait for a character to be entered
    return 0;
}

In particular this section asks:

Think of at least five more errors you might have made typing in your program (e.g. forget keep_window_open(), leave the Caps Lock key on while typing a word, or type a comma instead of a semicolon) and try each to see what happens when you try to compile and run those versions.

For the cout line, you can see that there is a comma instead of a semicolon.
This compiles and runs (for me). Is it making an assumption ( like in the javascript question: Why use semicolon? ) that the statement has been terminated ?

Because when I try for keep_terminal_open(); the compiler informs me of the semicolon exclusion.