*fixed* documentation thanks to @AnkurTank (issue #49)

Author: Benedikt Schmitt

filelock.py

@@ -235,7 +235,7 @@ def acquire(self, timeout=None, poll_intervall=0.05):
 
         :arg float timeout:
             The maximum time waited for the file lock.
-            If ``timeout <= 0``, there is no timeout and this method will
+            If ``timeout < 0``, there is no timeout and this method will
             block until the lock could be acquired.
             If ``timeout`` is None, the default :attr:`~timeout` is used.