diff --git a/dotdrop/cfg_aggregator.py b/dotdrop/cfg_aggregator.py
index a51c3fa..dc0d5bc 100644
--- a/dotdrop/cfg_aggregator.py
+++ b/dotdrop/cfg_aggregator.py
@@ -8,8 +8,8 @@ handle higher level of the config file
 import os
 import shlex
 import platform
-import distro
 import re
+import distro
 
 
 # local imports
@@ -25,7 +25,7 @@ from dotdrop.exceptions import UndefinedException, YamlException, \
 
 
 TILD = '~'
-YAML_OK = '[^0-9a-zA-Z.\-_]+'
+YAML_OK = r'[^0-9a-zA-Z.\-_]+'
 YAML_REPL = '_'
 
 
diff --git a/dotdrop/options.py b/dotdrop/options.py
index 62252ca..ca14e22 100644
--- a/dotdrop/options.py
+++ b/dotdrop/options.py
@@ -61,7 +61,7 @@ USAGE = f"""
 Usage:
   dotdrop install   [-VbtfndDaWR] [-c <path>] [-p <profile>]
                                   [-w <nb>] [<key>...]
-  dotdrop import    [-Vbdfm]      [-c <path>] [-p <profile>] 
+  dotdrop import    [-Vbdfm]      [-c <path>] [-p <profile>]
                                   [-i <pattern>...] [--dkey=<key>]
                                   [--transr=<key>] [--transw=<key>]
                                   [-l <link>] [-s <path>] <path>...