Minor tweaks to overview of the svn:mergeinfo property in svn_mergeinfo.h.
Minor tweaks to overview of the svn:mergeinfo property in svn_mergeinfo.h.

* subversion/include/svn_mergeinfo.h
  (SVN_PROP_MERGEINFO overview comment): A few tweaks, notably that elision
  doesn't occur after a switch or update anymore (hasn't for a long time in
  fact). 


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@870133 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion