diff --git a/_pytest/capture.py b/_pytest/capture.py
index 75acb178b..3895a714a 100644
--- a/_pytest/capture.py
+++ b/_pytest/capture.py
@@ -308,7 +308,7 @@ class NoCapture:
 class FDCapture:
     """ Capture IO to/from a given os-level filedescriptor. """
 
-    def __init__(self, targetfd, tmpfile=None):        
+    def __init__(self, targetfd, tmpfile=None):
         self.targetfd = targetfd
         try:
             self.targetfd_save = os.dup(self.targetfd)