diff --git a/PyTeX/format/macros.py b/PyTeX/format/macros.py
index 0bf8750..c08a286 100644
--- a/PyTeX/format/macros.py
+++ b/PyTeX/format/macros.py
@@ -106,6 +106,7 @@ class SingleLineMacro(Macro, ABC):
     ):
         self.chars = chars
         self.strip = strip
+
     def matches(self, line: str) -> bool:
         if line.find(self.chars) != -1:
             if not line.strip(self.strip) == self.chars:
@@ -114,6 +115,7 @@ class SingleLineMacro(Macro, ABC):
         else:
             return False
 
+
 class ConfigBeginMacro(SingleLineMacro):
     def __init__(self):
         super(ConfigBeginMacro, self).__init__(FORMATTER_PREFIX + INFILE_CONFIG_BEGIN_CONFIG)
@@ -124,6 +126,7 @@ class ConfigBeginMacro(SingleLineMacro):
         formatter.mode = FormatterMode.drop
         return []
 
+
 class ConfigEndMacro(SingleLineMacro):
     def __init__(self):
         super(ConfigEndMacro, self).__init__(FORMATTER_PREFIX + INFILE_CONFIG_END_CONFIG)
@@ -134,6 +137,7 @@ class ConfigEndMacro(SingleLineMacro):
         formatter.mode = FormatterMode.normal
         return []
 
+
 class ArgumentMacro(Macro):
     def __init__(
             self,