[meld] Inline and simplify _find_blank_lines

[Kai Willadsen <kaiw src gnome org>]

commit 9f4c733a1958944ebd2611fbc12ffbba40a0df30
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Wed Jun 20 07:00:33 2012 +1000

    Inline and simplify _find_blank_lines

 meld/diffutil.py |   23 ++++++++++-------------
 1 files changed, 10 insertions(+), 13 deletions(-)
---
diff --git a/meld/diffutil.py b/meld/diffutil.py
index 517afce..ffeafa8 100644
--- a/meld/diffutil.py
+++ b/meld/diffutil.py
@@ -176,9 +176,17 @@ class Differ(gobject.GObject):
         if c is None:
             return None
 
+        def _find_blank_lines(txt, lo, hi):
+            while not txt[lo] and lo < hi:
+                lo += 1
+            while not txt[hi - 1] and lo < hi:
+                hi -= 1
+            return lo, hi
+
         tag = c.tag
-        c1, c2 = self._find_blank_lines(texts[pane1], c[1], c[2])
-        c3, c4 = self._find_blank_lines(texts[pane2], c[3], c[4])
+        c1, c2 = _find_blank_lines(texts[pane1], c[1], c[2])
+        c3, c4 = _find_blank_lines(texts[pane2], c[3], c[4])
+
         if c1 == c2 and c3 == c4:
             return None
         if c1 == c2 and tag == "replace":
@@ -187,17 +195,6 @@ class Differ(gobject.GObject):
             c0 = "delete"
         return DiffChunk._make((tag, c1, c2, c3, c4))
 
-    def _find_blank_lines(self, txt, lo, hi):
-        for line in range(lo, hi):
-            if txt[line]:
-                break
-            lo += 1
-        for line in range(hi, lo, -1):
-            if txt[line - 1]:
-                break
-            hi -= 1
-        return lo, hi
-
     def change_sequence(self, sequence, startidx, sizechange, texts):
         assert sequence in (0, 1, 2)
         if sequence == 0 or sequence == 1: