[meld] Minor PEP8 fixes

[Kai Willadsen <kaiw src gnome org>]

commit 6f928ff9174b7ca36308a3dff3643c6fd9280cf2
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Fri Nov 17 08:04:43 2017 +1000

    Minor PEP8 fixes

 meld/build_helpers.py |    2 +-
 meld/linkmap.py       |   17 +++++++++++------
 meld/misc.py          |    2 +-
 3 files changed, 13 insertions(+), 8 deletions(-)
---
diff --git a/meld/build_helpers.py b/meld/build_helpers.py
index a7f23d5..c8bdac9 100644
--- a/meld/build_helpers.py
+++ b/meld/build_helpers.py
@@ -339,7 +339,7 @@ class build_py(distutils.command.build_py.build_py):
                 options = self.distribution.get_option_dict('install')
                 prefix = options['prefix'][1]
             except KeyError as e:
-                print (e)
+                print(e)
                 prefix = sys.prefix
 
             datadir = os.path.join(prefix, 'share', 'meld')
diff --git a/meld/linkmap.py b/meld/linkmap.py
index f7f7e63..15a8471 100644
--- a/meld/linkmap.py
+++ b/meld/linkmap.py
@@ -67,10 +67,12 @@ class LinkMap(Gtk.DrawingArea):
         context.set_line_width(1.0)
 
         height = allocation.height
-        visible = [self.views[0].get_line_num_for_y(pix_start[0]),
-                   self.views[0].get_line_num_for_y(pix_start[0] + height),
-                   self.views[1].get_line_num_for_y(pix_start[1]),
-                   self.views[1].get_line_num_for_y(pix_start[1] + height)]
+        visible = [
+            self.views[0].get_line_num_for_y(pix_start[0]),
+            self.views[0].get_line_num_for_y(pix_start[0] + height),
+            self.views[1].get_line_num_for_y(pix_start[1]),
+            self.views[1].get_line_num_for_y(pix_start[1] + height),
+        ]
 
         wtotal = allocation.width
         # For bezier control points
@@ -78,8 +80,11 @@ class LinkMap(Gtk.DrawingArea):
         q_rad = math.pi / 2
 
         left, right = self.view_indices
-        view_offset_line = lambda v, l: (self.views[v].get_y_for_line_num(l) -
-                                         pix_start[v] + y_offset[v])
+
+        def view_offset_line(view_idx, line_num):
+            line_start = self.views[view_idx].get_y_for_line_num(line_num)
+            return line_start - pix_start[view_idx] + y_offset[view_idx]
+
         for c in self.filediff.linediffer.pair_changes(left, right, visible):
             # f and t are short for "from" and "to"
             f0, f1 = [view_offset_line(0, l) for l in c[1:3]]
diff --git a/meld/misc.py b/meld/misc.py
index f368eab..04579cd 100644
--- a/meld/misc.py
+++ b/meld/misc.py
@@ -27,7 +27,6 @@ import subprocess
 
 from gi.repository import Gdk
 from gi.repository import GLib
-from gi.repository import GObject
 from gi.repository import Gtk
 from gi.repository import GtkSource
 
@@ -182,6 +181,7 @@ def get_base_style_scheme():
 
     return base_style_scheme
 
+
 base_style_scheme = None