remove extra white-space

Author: Martin Patz

pywal/util.py

@@ -47,7 +47,7 @@ def alpha(self):
     def alpha_dec(self):
         """Export the alpha value as a decimal number in [0, 1]."""
         return int(self.alpha_num) / 100
-    
+
     @property
     def octal(self):
         """Export color in octal."""