diff --git a/linkcheck/decorators.py b/linkcheck/decorators.py
index 85c23457..5b18f84a 100644
--- a/linkcheck/decorators.py
+++ b/linkcheck/decorators.py
@@ -118,10 +118,10 @@ def synchronize (lock, func):
 
 
 def synchronized (lock):
-     """
-     A decorator calling a function with aqcuired lock.
-     """
-     return lambda func: synchronize(lock, func)
+    """
+    A decorator calling a function with aqcuired lock.
+    """
+    return lambda func: synchronize(lock, func)
 
 
 def notimplemented (func):
@@ -193,4 +193,3 @@ class curried (object):
             return curried(self.func, *args)
         else:
             return self.func(*args)
-
diff --git a/linkcheck/dns/resolver.py b/linkcheck/dns/resolver.py
index 862653fc..a80df051 100644
--- a/linkcheck/dns/resolver.py
+++ b/linkcheck/dns/resolver.py
@@ -585,9 +585,9 @@ class Resolver(object):
                 request.use_tsig(self.keyring, self.keyname)
             request.use_edns(self.edns, self.ednsflags, self.payload)
             response = None
-           
+
             # make a copy of the servers list so we can alter it later.
-           
+
             nameservers = self.nameservers[:]
             backoff = 0.10
             while response is None:
@@ -605,24 +605,24 @@ class Resolver(object):
                             response = linkcheck.dns.query.udp(request, nameserver,
                                                      timeout, self.port)
                     except (socket.error, linkcheck.dns.exception.Timeout):
-                       
+
                         # Communication failure or timeout.  Go to the
                         # next server
-                       
+
                         response = None
                         continue
                     except linkcheck.dns.query.UnexpectedSource:
-                       
+
                         # Who knows?  Keep going.
-                       
+
                         response = None
                         continue
                     except linkcheck.dns.exception.FormError:
-                       
+
                         # We don't understand what this server is
                         # saying.  Take it out of the mix and
                         # continue.
-                       
+
                         nameservers.remove(nameserver)
                         response = None
                         continue
@@ -630,22 +630,22 @@ class Resolver(object):
                     if rcode == linkcheck.dns.rcode.NOERROR or \
                            rcode == linkcheck.dns.rcode.NXDOMAIN:
                         break
-                   
+
                     # We got a response, but we're not happy with the
                     # rcode in it.  Remove the server from the mix if
                     # the rcode isn't SERVFAIL.
-                   
+
                     if rcode != linkcheck.dns.rcode.SERVFAIL:
                         nameservers.remove(nameserver)
                     response = None
-               
+
                 # All nameservers failed!
-               
+
                 if len(nameservers) > 0:
-                   
+
                     # But we still have servers to try.  Sleep a bit
                     # so we don't pound them!
-                   
+
                     timeout = self._compute_timeout(start)
                     sleep_time = min(timeout, backoff)
                     backoff *= 2
diff --git a/linkcheck/fileutil.py b/linkcheck/fileutil.py
index c8840226..4f06411d 100644
--- a/linkcheck/fileutil.py
+++ b/linkcheck/fileutil.py
@@ -61,7 +61,7 @@ def has_module (name):
     """
     try:
         exec "import %s" % name
-	return True
+        return True
     except ImportError:
         return False
 
@@ -170,4 +170,3 @@ def has_changed (filename):
         _mtime_cache[key] = mtime
         return True
     return mtime > _mtime_cache[key]
-