revert: prefix variable names for dirstate status with "ds"

As we are going to introduce status again other revision we needs to distinguish
between data from dirstate status and the other one. We prefix the existing data
with "ds" to highlight this.

mercurial/cmdutil.py

@@ -2369,14 +2369,14 b' def revert(ui, repo, ctx, parents, *pats'
         # Find status of all file in `names`. (Against working directory parent)
         m = scmutil.matchfiles(repo, names)
         changes = repo.status(node1=parent, match=m)[:4]
-        modified, added, removed, deleted = map(set, changes)
+        dsmodified, dsadded, dsremoved, dsdeleted = map(set, changes)
 
         # if f is a rename, update `names` to also revert the source
         cwd = repo.getcwd()
-        for f in added:
+        for f in dsadded:
             src = repo.dirstate.copied(f)
             if src and src not in names and repo.dirstate[src] == 'r':
-                removed.add(src)
+                dsremoved.add(src)
                 names[src] = (repo.pathto(src, cwd), True)
 
         ## computation of the action to performs on `names` content.
@@ -2389,14 +2389,14 b' def revert(ui, repo, ctx, parents, *pats'
         # split between files known in target manifest and the others
         smf = set(mf)
 
-        missingmodified = modified - smf
-        modified -= missingmodified
-        missingadded = added - smf
-        added -= missingadded
-        missingremoved = removed - smf
-        removed -= missingremoved
-        missingdeleted = deleted - smf
-        deleted -= missingdeleted
+        missingmodified = dsmodified - smf
+        dsmodified -= missingmodified
+        missingadded = dsadded - smf
+        dsadded -= missingadded
+        missingremoved = dsremoved - smf
+        dsremoved -= missingremoved
+        missingdeleted = dsdeleted - smf
+        dsdeleted -= missingdeleted
 
         # action to be actually performed by revert
         # (<list of file>, message>) tuple
@@ -2410,13 +2410,13 b' def revert(ui, repo, ctx, parents, *pats'
             #   file state
             #   action
             #   make backup
-            (modified,         (actions['revert'],   True)),
+            (dsmodified,       (actions['revert'],   True)),
             (missingmodified,  (actions['remove'],   True)),
-            (added,            (actions['revert'],   True)),
+            (dsadded,          (actions['revert'],   True)),
             (missingadded,     (actions['remove'],   False)),
-            (removed,          (actions['undelete'], True)),
+            (dsremoved,        (actions['undelete'], True)),
             (missingremoved,   (None,                False)),
-            (deleted,          (actions['revert'],   False)),
+            (dsdeleted,        (actions['revert'],   False)),
             (missingdeleted,   (actions['remove'],   False)),
             )