to a country not yet visited: interesting, but not the same as being
there.
-Much of this introduction is dedicated to walk-throughs or guided tours
+Much of this introduction is dedicated to walkthroughs or guided tours
of code used in GNU Emacs. These tours are designed for two purposes:
first, to give you familiarity with real, working code (code you use
every day); and, second, to give you familiarity with the way Emacs