[meld/ui-next] chunkmap: PEP8

[Kai Willadsen <kaiw src gnome org>]

commit f928994bb3105ee254d3d92efb28116447ee6b60
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sat Apr 13 09:50:25 2019 +1000

    chunkmap: PEP8

 meld/chunkmap.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/meld/chunkmap.py b/meld/chunkmap.py
index 5c4d032b..4a038872 100644
--- a/meld/chunkmap.py
+++ b/meld/chunkmap.py
@@ -138,7 +138,8 @@ class ChunkMap(Gtk.DrawingArea):
             for tag, diffs in tagged_diffs.items():
                 cache_ctx.set_source_rgba(*self.fill_colors[tag])
                 for y0, y1 in diffs:
-                    y0, y1 = round(y0 * height_scale) + 0.5, round(y1 * height_scale) - 0.5
+                    y0 = round(y0 * height_scale) + 0.5
+                    y1 = round(y1 * height_scale) - 0.5
                     cache_ctx.rectangle(x0, y0, x1, y1 - y0)
                 cache_ctx.fill_preserve()
                 cache_ctx.set_source_rgba(*self.line_colors[tag])