Revert "test commit"

This reverts commit f13781f35c.

graphics/spirograph.c

@@ -84,7 +84,6 @@ void test(void)
         exit(EXIT_FAILURE);
     }
 
-    // arrays to store points (x,y)
     double *x = (double *)malloc(N * sizeof(double));
     double *y = (double *)malloc(N * sizeof(double));
 

misc/sudoku_solver.c

@@ -37,7 +37,7 @@ struct sudoku
 };
 
 /**
- * Function to check if `x`^th row is valid
+ * Check if `x`^th row is valid
  * @param a ::sudoku to check
  * @param x row to check
  * @param y ignored column