Fix: >= and so on are usually called "comparison operators", not "logical operators". Found by Tom Kalt on docs@.

Closes #15228: remove reference to Unix "touch"; it is confusing since the path needs to exist for os.utime() to succeed

Patch by Filip Gruszczyński.

Fix order of required StreamReader/StreamWriter base classes.  Spotted by Edward Welbourne on docs@.

Found by Helge Stenström on docs@.