diff --git a/Image.py b/Image.py
index e418c11aee69208107bbab9f6cdd9be531a079ed..669d1462f666007bb579db8063b487139a1bc10b 100644
--- a/Image.py
+++ b/Image.py
@@ -86,7 +86,7 @@ class Image:
     def trim_lines(lines):
         for i in range(len(lines)):
             lines[i] = lines[i].removesuffix('\n')
-        return lines
+        return  lines
 
     @staticmethod
     def check_for_magic_number(lines):
diff --git a/Kernel.py b/Kernel.py
index 93f6fec054c1522087e79f8ab650e3f8fab64208..f62fdbb7cd3a511bc9eb10632acfe1685b14c874 100644
--- a/Kernel.py
+++ b/Kernel.py
@@ -14,6 +14,7 @@ class Kernel:
         sub_matrix = border_behavior.get_submatrix_list([height, width], matrix)
         result = 0
 
+
         for a, b in zip(self.filter_list, sub_matrix):
             if type(b) == type("string"):
                 b = int(b)
diff --git a/main.py b/main.py
index 7faeb41bb83d39fe155c87e7d00b178d6c3a979d..7c3fe47bd0c237c3411f758891938181e12581fe 100644
--- a/main.py
+++ b/main.py
@@ -37,6 +37,8 @@ def aufgabe2():
     e.convolve(boxfilter_27, zero_p_bb, "./images/Ergebnis2-27.pgm")
 
 
+#bekannte Bugs: Beide Prewitt-Filter erzeugen links auf mittlerer Höhe ein Quadrat an weißen Pixeln, die schwarz bleiben sollten
+#               Boxfilter verdunkelt das Bild
 
 if __name__ == "__main__":
     aufgabe1()