* doc/book/book/appb.xml
(svn-ap-b-sect-1.2.2): Change 'svn cleanup working-copy' to just 'svn
cleanup' since the text says to run it from the top of the WC.
* doc/book/book/ch02.xml
(svn-ch-2-sect-3.1): Change 'ls -a' to 'ls -A' since . and .. are not
shown in the output.
* doc/book/book/ch03.xml
(svn-ch-3-sect-4): Change revision 3678 to revision 2499 to be
consistent with all the other examples.
* doc/book/book/ch04.xml
(svn-ch-4-sect-2.1): Change trunk/ to trunk because trailing slashes
are not used that way in other examples.
(svn-ch-4-sect-6.2): Remove . and .. from ls output (no -a was given).
