For Xwiki tailing slash is the same as WebHome page. So description
above is not correct.
Correct explanation is following:
http://localhost/xwiki/bin/view/FAQ/ is the same as
http://localhost/xwiki/bin/view/FAQ/WebHome without tailing slash.
For other pages URL always finishes with Pagename, not slash, e.g.
http://localhost/xwiki/bin/view/FAQ/Page1
http://localhost/xwiki/bin/view/FAQ/Page2 etc.
http://localhost/xwiki/bin/view/FAQ/WebHome/ is the same as
http://localhost/xwiki/bin/view/FAQ/WebHome/WebHome
(in this case 1st "WebHome" is space under "Main" space, but 2nd
"WebHome" is page in "WebHome" space).
Valdis