[Subversion Wiki] Update of "NodesOperations" by GregStein

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The "NodesOperations" page has been changed by GregStein:
http://wiki.apache.org/subversion/NodesOperations?action=diff&rev1=2&rev2=3

Comment:
describe the Ev2 update process (confirm Philip's description)

  = Update =
+ 
+ === Editor v1 ===
  
  Updating using the current v1 editor changes the base node tree in several steps converting to and from mixed-revisions.  Starting with a simple singe-revision tree:
  
@@ -72, +74 @@

  ||  0       ||    B          || normal   ||     4    ||
  |||||||| '''table A7''' ||
  
- We don't yet know all the details of the v2 editor update but it is likely that the modify file A/f call will change the original single-revision tree into:
+ === Editor v2 ===
+ 
+ With editor v2, the update process will construct an editor that will perform its editing operations and apply a specific revision to each node touched. After all operations are done, the callback for svn_editor_complete() will mark all nodes with that target revision.
+ 
+ For the example above, svn_editor_alter_file("A/f") will update a single row:
  
  || op-depth || local-relpath || presence || revision ||
  ||  0       ||               || normal   ||     3    ||