status: improve explanation of ' ' status

a) it shows for states other than 'A'
b) it only shows with --copies

mercurial/commands.py

@@ -5289,7 +5289,7 b' def status(ui, repo, *pats, **opts):'
       ! = missing (deleted by non-hg command, but still tracked)
       ? = not tracked
       I = ignored
-        = origin of the previous file listed as A (added)
+        = origin of the previous file (with --copies)
 
     .. container:: verbose
 

tests/test-help.t

@@ -563,7 +563,7 b' Test command without options'
         ! = missing (deleted by non-hg command, but still tracked)
         ? = not tracked
         I = ignored
-          = origin of the previous file listed as A (added)
+          = origin of the previous file (with --copies)
   
       Returns 0 on success.