Issue 15 in svnbook: Examples should make more accurate use of peg/working revisions

[svnbook at googlecode.com]

Updates:
	Labels: -Milestone-whenever Milestone-en-1.8

Comment #6 on issue 15 by cmpilato: Examples should make more accurate use  
of peg/working revisions
http://code.google.com/p/svnbook/issues/detail?id=15

I'll try to wrap this up for 1.8, too.  Peg revisions remain a source of  
confusion for some users.