refactoring: Testvariablen verbessert

src/test/test_funktionen.c

@@ -251,9 +251,9 @@ void test_pressure_at_force360_area12(void)
     int expected = 30;
 
     /* act */
-    int f = 360;
-    int a = 12;
-    actual = calculatePressure(f, a);
+    int force = 360;
+    int area = 12;
+    actual = calculatePressure(force, area);
 
     /* assert */
     TEST_ASSERT_EQUAL_INT(expected, actual);