syle: run black formatter and changed comment description

src/lineare_algebra/task3.py

@@ -44,7 +44,7 @@ D = -2 * A
 E = sp.Rational(1, 3) * B  # ← keeps fractions exact, e.g. 1 not 0.333...
 F = 2 * B - A
 
-# Ausgabe – symbolic, paper-style
+# Ausgabe, symbolisch
 for name, matrix in [("C", C), ("D", D), ("E", E), ("F", F)]:
     display(Math(rf"{name} = {sp.latex(matrix)}"))
 
@@ -74,7 +74,7 @@ berechnungen = [
     ("g", lambda: v * u),
     ("h", lambda: u * v.T),
     ("i", lambda: B.T * v),
-    ("j", lambda: v.T * B)
+    ("j", lambda: v.T * B),
 ]
 
 for name, berechnung in berechnungen: