[PATCH 1 of 4] checkcopies: move 'movewithdir' initialisation right before its usage

[Pierre-Yves David]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at ens-lyon.org>
# Date 1476144923 -7200
#      Tue Oct 11 02:15:23 2016 +0200
# Node ID ea295754eb9a275b61a17e60aa4384dea2544d86
# Parent  0f0f99922ea75695d6044001aa82c31792386e9a
# EXP-Topic checkcopies
checkcopies: move 'movewithdir' initialisation right before its usage

The 'movewithdir' had a lot of related logic all around the 'mergecopies'.
However it is actually never containing anything until the very last loop in
that function. We move the (simplified) variable definition there for clarity

diff --git a/mercurial/copies.py b/mercurial/copies.py
--- a/mercurial/copies.py
+++ b/mercurial/copies.py
@@ -333,7 +333,6 @@ def mergecopies(repo, c1, c2, ca):
 
     # see _checkcopies documentation below for these dicts
     copy1, copy2 = {}, {}
-    movewithdir1, movewithdir2 = {}, {}
     fullcopy1, fullcopy2 = {}, {}
     diverge = {}
 
@@ -351,7 +350,6 @@ def mergecopies(repo, c1, c2, ca):
         _checkcopies(c2, f, m2, m1, ca, limit, diverge, copy2, fullcopy2)
 
     copy = dict(copy1.items() + copy2.items())
-    movewithdir = dict(movewithdir1.items() + movewithdir2.items())
     fullcopy = dict(fullcopy1.items() + fullcopy2.items())
 
     renamedelete = {}
@@ -395,7 +393,7 @@ def mergecopies(repo, c1, c2, ca):
     del divergeset
 
     if not fullcopy:
-        return copy, movewithdir, diverge, renamedelete
+        return copy, {}, diverge, renamedelete
 
     repo.ui.debug("  checking for directory renames\n")
 
@@ -433,12 +431,13 @@ def mergecopies(repo, c1, c2, ca):
     del d1, d2, invalid
 
     if not dirmove:
-        return copy, movewithdir, diverge, renamedelete
+        return copy, {}, diverge, renamedelete
 
     for d in dirmove:
         repo.ui.debug("   discovered dir src: '%s' -> dst: '%s'\n" %
                       (d, dirmove[d]))
 
+    movewithdir = {}
     # check unaccounted nonoverlapping files against directory moves
     for f in u1r + u2r:
         if f not in fullcopy: