diff --git a/plugins/disk/btrfs_device_usage b/plugins/disk/btrfs_device_usage
index 4aca7d16..04af4642 100755
--- a/plugins/disk/btrfs_device_usage
+++ b/plugins/disk/btrfs_device_usage
@@ -1,4 +1,4 @@
-#!/usr/bin/python3 
+#!/usr/bin/python3
 #
 # This file contains a munin-plugin to gather btrfs statistics per device.
 #
@@ -19,6 +19,7 @@
 import btrfs
 import sys
 
+
 def munin_config(fs):
     fsid = str(fs.fsid).replace('-', '_')
     
@@ -34,7 +35,8 @@ def munin_config(fs):
     for this_device in devices:
         this_dev_info = fs.dev_info(this_device.devid)
         this_dev_name = this_dev_info.path.replace('/dev/', '')
-        print("btrfs_bytes_"+ fsid + "_" + str(this_device.devid) + ".label " + this_dev_name)
+        print("btrfs_bytes_" + fsid + "_" + str(this_device.devid) + \
+                ".label " + this_dev_name)
     
     print("")
     
@@ -44,18 +46,21 @@ def munin_config(fs):
     print("graph_scale no")
     print("graph_vlabel %")
     print("graph_category disk")
-    print("graph_info This graph shows percentage used by btrfs on every device. Maesured in percentage of device capacity.")
+    print("graph_info This graph shows percentage used by btrfs on every \
+            device. Maesured in percentage of device capacity.")
     
     devices = fs.devices()
     for this_device in devices:
         this_dev_info = fs.dev_info(this_device.devid)
         this_dev_name = this_dev_info.path.replace('/dev/', '')
-        print("btrfs_percent_"+ fsid + "_" + str(this_device.devid) + ".label " + this_dev_name)
-        print("btrfs_percent_"+ fsid + "_" + str(this_device.devid) + ".warning 95")
-        print("btrfs_percent_"+ fsid + "_" + str(this_device.devid) + ".critical 98")
+        print("btrfs_percent_" + fsid + "_" + str(this_device.devid) + \
+                ".label " + this_dev_name)
+        print("btrfs_percent_" + fsid + "_" + str(this_device.devid) + ".warning 95")
+        print("btrfs_percent_" + fsid + "_" + str(this_device.devid) + ".critical 98")
     
     print("")
 
+
 def munin_values(fs):
     fsid = str(fs.fsid).replace('-', '_')
     devices = fs.devices()
@@ -64,7 +69,8 @@ def munin_values(fs):
     
     for this_device in devices:
         this_dev_info = fs.dev_info(this_device.devid)
-        print("btrfs_bytes_"+ fsid + "_" + str(this_device.devid) + ".value " + str(this_dev_info.bytes_used))
+        print("btrfs_bytes_" + fsid + "_" + str(this_device.devid) + \
+                ".value " + str(this_dev_info.bytes_used))
     
     print("")
     
@@ -76,7 +82,8 @@ def munin_values(fs):
     for this_device in devices:
         this_dev_info = fs.dev_info(this_device.devid)
         usage = 100.0 * this_dev_info.bytes_used / this_dev_info.total_bytes
-        print("btrfs_percent_"+ fsid + "_" + str(this_device.devid) + ".value " + str(round(usage, 2)))
+        print("btrfs_percent_" + fsid + "_" + str(this_device.devid) + \
+                ".value " + str(round(usage, 2)))
     
     print("")