Changing `Test` to `Usage`

subjects/quad/README.md

@@ -8,7 +8,7 @@ Write a function `QuadA` that prints a **valid** rectangle with a given width of
 
 The function must draw the rectangles as in the examples.
 
-If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples; oherwise, the function should print nothing.
+If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples, oherwise, the function should print nothing.
 
 ### Expected function
 
@@ -18,7 +18,7 @@ func QuadA(x,y int) {
 }
 ```
 
-### Test
+### Usage
 
 Here are possible programs to test your function :
 
@@ -118,7 +118,7 @@ Write a function `QuadB` that prints a **valid** rectangle of width `x` and of h
 
 The function must draw the rectangles as in the examples.
 
-If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples; oherwise, the function should print nothing.
+If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples, oherwise, the function should print nothing.
 
 
 ### Expected function
@@ -129,7 +129,7 @@ func QuadB(x,y int) {
 }
 ```
 
-### Test
+### Usage
 
 Here are possible programs to test your function :
 
@@ -229,8 +229,7 @@ Write a function `QuadC` that prints a **valid** rectangle of width `x` and of h
 
 The function must draw the rectangles as in the examples.
 
-If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples; oherwise, the function should print nothing.
-
+If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples, oherwise, the function should print nothing.
 
 ### Expected function
 
@@ -240,7 +239,7 @@ func QuadC(x,y int) {
 }
 ```
 
-### Test
+### Usage
 
 Here are possible programs to test your function :
 
@@ -340,7 +339,7 @@ Write a function `QuadD` that prints a **valid** rectangle of width `x` and of h
 
 The function must draw the rectangles as in the examples.
 
-If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples; oherwise, the function should print nothing.
+If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples, oherwise, the function should print nothing.
 
 ### Expected function
 
@@ -350,7 +349,7 @@ func QuadD(x,y int) {
 }
 ```
 
-### Test
+### Usage
 
 Here are possible programs to test your function :
 
@@ -450,7 +449,7 @@ Write a function `QuadE` that prints a **valid** rectangle of width `x` and of h
 
 The function must draw the rectangles as in the examples.
 
-If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples; oherwise, the function should print nothing.
+If `x` and `y` are positive numbers, the program should print the rectangles as seen in the examples, oherwise, the function should print nothing.
 
 
 ### Expected function
@@ -461,7 +460,7 @@ func QuadE(x,y int) {
 }
 ```
 
-### Test
+### Usage
 
 Here are possible programs to test your function :