minor #19101 Add sleep to observe the changes in the terminal when executing the code (sungvadan)

This PR was submitted for the 6.4 branch but it was merged into the 5.4 branch instead.

Discussion
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Add sleep to observe the changes in the terminal when executing the code

Add sleep() to observe the changes in the terminal when executing the code

When I copy and execute the code in the terminal, it runs too quickly, and I don't see anything appearing on the terminal. I struggle for a moment to understand the behavior of the 'output section.'

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Commits
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95ad8ec Add sleep to observe the changes in the terminal when executing the code.

Author: OskarStark

console.rst

@@ -346,19 +346,23 @@ method, which returns an instance of
 
             $section1->writeln('Hello');
             $section2->writeln('World!');
+            sleep(1);
             // Output displays "Hello\nWorld!\n"
 
             // overwrite() replaces all the existing section contents with the given content
             $section1->overwrite('Goodbye');
+            sleep(1);
             // Output now displays "Goodbye\nWorld!\n"
 
             // clear() deletes all the section contents...
             $section2->clear();
+            sleep(1);
             // Output now displays "Goodbye\n"
 
             // ...but you can also delete a given number of lines
             // (this example deletes the last two lines of the section)
             $section1->clear(2);
+            sleep(1);
             // Output is now completely empty!
 
             return Command::SUCCESS;