Issue 28 in svnbook: 'svn checkout --force' option and E code not explained

[svnbook at googlecode.com]

Updates:
	Status: Fixed

Comment #4 on issue 28 by cmpil... at gmail.com: 'svn checkout --force' option  
and E code not explained
http://code.google.com/p/svnbook/issues/detail?id=28

FIXED:
    Sending        book/ch09-reference.xml
    Transmitting file data .
    Committed revision 3906.