diff --git a/make/scripts/version-info.py b/make/scripts/version-info.py
index 2dc0d4381..e3a3724d6 100644
--- a/make/scripts/version-info.py
+++ b/make/scripts/version-info.py
@@ -267,58 +267,59 @@ def xtrim(string, suffix, length):
         return ''.join([string[:n], '+', suffix])
 
 def GetHashofDirs(directory, verbose=0, raw=0):
-  import hashlib, os
-  SHAhash = hashlib.sha1()
-  if not os.path.exists (directory):
-    return -1
-    
-  try:
-    for root, dirs, files in os.walk(directory):
-      # os.walk() is unsorted.  Must make sure we process files in sorted order so
-      # that the hash is stable across invocations and across OSes.
-      if files:
-          files.sort()
+    """Return hash of XML files from UAVObject definition directory"""
+    import hashlib, os
+    SHAhash = hashlib.sha1()
+    if not os.path.exists (directory):
+        return -1
 
-      for names in files:
-        if verbose == 1:
-          print 'Hashing', names
-        filepath = os.path.join(root,names)
-        try:
-          f1 = open(filepath, 'rU')
-        except:
-          # You can't open the file for some reason
-          f1.close()
-          continue
+    try:
+        for root, dirs, files in os.walk(directory):
+            # os.walk() is unsorted. Must make sure we process files in sorted
+            # order so that the hash is stable across invocations and across OSes.
+            if files:
+                files.sort()
 
-        # Compute file hash.  Same as running "sha1sum <file>".
-        f1hash = hashlib.sha1()
-        while 1:
-          # Read file in as little chunks
-          buf = f1.read(4096)
-          if not buf : break
-          f1hash.update(buf)
-        f1.close()
+            for names in files:
+                if verbose == 1:
+                    print 'Hashing', names
+                filepath = os.path.join(root, names)
+                try:
+                    f1 = open(filepath, 'rU')
+                except:
+                    # You can't open the file for some reason
+                    f1.close()
+                    continue
 
-        if verbose == 1:
-          print 'Hash is', f1hash.hexdigest()
+                # Compute file hash. Same as running "sha1sum <file>".
+                f1hash = hashlib.sha1()
+                while 1:
+                    # Read file in as little chunks
+                    buf = f1.read(4096)
+                    if not buf : break
+                    f1hash.update(buf)
+                f1.close()
 
-        # Append the hex representation of the current file's hash into the cumulative hash
-        SHAhash.update(f1hash.hexdigest())
+                if verbose == 1:
+                    print 'Hash is', f1hash.hexdigest()
 
-  except:
-    import traceback
-    # Print the stack traceback
-    traceback.print_exc()
-    return -2
+                # Append the hex representation of the current file's hash into the cumulative hash
+                SHAhash.update(f1hash.hexdigest())
 
-  if verbose == 1:
-      print 'Final hash is', SHAhash.hexdigest()
+    except:
+        import traceback
+        # Print the stack traceback
+        traceback.print_exc()
+        return -2
 
-  if raw == 1:
-      return SHAhash.hexdigest()
-  else:
-      hex_stream = lambda s:",".join(['0x'+hex(ord(c))[2:].zfill(2) for c in s])
-      return hex_stream(SHAhash.digest())
+    if verbose == 1:
+        print 'Final hash is', SHAhash.hexdigest()
+
+    if raw == 1:
+        return SHAhash.hexdigest()
+    else:
+        hex_stream = lambda s:",".join(['0x'+hex(ord(c))[2:].zfill(2) for c in s])
+        return hex_stream(SHAhash.digest())
 
 def main():
     """This utility uses git repository in the current working directory
@@ -409,8 +410,8 @@ string given.
         BOARD_TYPE = args.type,
         BOARD_REVISION = args.revision,
         SHA1 = sha1(args.image),
-        UAVOSHA1TXT = GetHashofDirs(args.uavodir,verbose=0,raw=1),
-        UAVOSHA1 = GetHashofDirs(args.uavodir,verbose=0,raw=0),
+        UAVOSHA1TXT = GetHashofDirs(args.uavodir, verbose=0, raw=1),
+        UAVOSHA1 = GetHashofDirs(args.uavodir, verbose=0, raw=0),
     )
 
     # Process positional arguments in the form of: