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Edited wiki page SvnBook17Status through web user interface.

Remove some unnecessary parentheses.

Spelling fix.

Merge from ^/trunk/en r4078 and r4079, which mostly fixed up some 'svn
info' output. (Resolving issue #151 for this branch.)

Finish Issue #150 ("1.7 change: 'svn info' now displays 'Working Copy
Root Path'") and issue #151 ("svn info' examples should show
'Repository Root' data.").

* en/book/ch03-advanced-topics.xml,
* en/book/ch09-reference.xml
Add missing 'Working Copy Root Path' and 'Repository Root' items in
'svn info' output examples.

Read-thru edits.

* en/book/ch03-advanced-topics.xml
(svn.advanced.pegrevs): Remove a stray character recently added.
(svn.advanced.props): Minor tweaks.
(svn.advanced.sparsedirs, svn.advanced.externals): Tweak wording to
not imply that 1.6 is the "current" offering.
(svn.advanced.locking.creation): Update 'svn info' output to
include 'Repository Root' and 'Working Copy Root Path' items.
(svn.advanced.locking.discovery): Update 'svn info' output to
include 'Repository Root' item.

Merge from ^/trunk/en r4076, which took a different approach to <refname>'s.

* en/book/ch09-reference.xml
Try a different approach to the <refname>'s.

Merge from ^/trunk/en the 1.6-relevant bits of r4070-r4073.

Edited wiki page SvnBook17Status through web user interface.