diff --git a/mopidy/utils/settings.py b/mopidy/utils/settings.py
index ce245f3b..4de7d1cf 100644
--- a/mopidy/utils/settings.py
+++ b/mopidy/utils/settings.py
@@ -208,18 +208,18 @@ def did_you_mean(setting, defaults):
 
 
 def levenshtein(a, b, max=3):
-    "Calculates the Levenshtein distance between a and b."
+    """Calculates the Levenshtein distance between a and b."""
     n, m = len(a), len(b)
     if n > m:
         return levenshtein(b, a)
 
     current = xrange(n+1)
-    for i in xrange(1,m+1):
-        previous, current = current, [i]+[0]*n
-        for j in xrange(1,n+1):
-            add, delete = previous[j]+1, current[j-1]+1
+    for i in xrange(1, m+1):
+        previous, current = current, [i] + [0] * n
+        for j in xrange(1, n+1):
+            add, delete = previous[j] + 1, current[j-1] + 1
             change = previous[j-1]
             if a[j-1] != b[i-1]:
-                change = change + 1
+                change += 1
             current[j] = min(add, delete, change)
     return current[n]