[meld] filediff: Variable renaming for some slight clarity

[Kai Willadsen <kaiw src gnome org>]

commit 949260fab2ba116388ec15a0dfa191a0ebff0a0a
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Jul 10 10:42:37 2016 +1000

    filediff: Variable renaming for some slight clarity

 meld/filediff.py |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/meld/filediff.py b/meld/filediff.py
index 9144127..d8cdc1f 100644
--- a/meld/filediff.py
+++ b/meld/filediff.py
@@ -1250,12 +1250,12 @@ class FileDiff(melddoc.MeldDoc, gnomeglade.Component):
 
         for chunk in need_highlighting:
             clear = chunk == modified_chunks
-            for i, c in enumerate(chunk):
+            for merge_cache_index, c in enumerate(chunk):
                 if not c or c[0] != "replace":
                     continue
-                to_idx = 2 if i == 1 else 0
-                bufs = self.textbuffer[1], self.textbuffer[to_idx]
-                tags = alltags[1], alltags[to_idx]
+                to_pane = 2 if merge_cache_index == 1 else 0
+                bufs = self.textbuffer[1], self.textbuffer[to_pane]
+                tags = alltags[1], alltags[to_pane]
 
                 starts = [b.get_iter_at_line_or_eof(l) for b, l in
                           zip(bufs, (c[1], c[3]))]