Some fixes to the README. Removed two diagnostics, added one

QuadraticFrog.pro.user

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README.md

 
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 ---
 
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 **Instrucciones**
 
-1.   Carga a Qt el proyecto `QuadraticFrog`  haciendo doble "click" en el archivo `QuadraticFrog.pro` que se encuentra en la carpeta `Documents/eip/Expressions-QuadraticFrog` de tu computadora. También puedes ir a `http://bitbucket.org/eip-uprrp/quadraticfrog` para descargar la carpeta `QuadraticFrog` a tu computadora.
+1.   Carga a Qt el proyecto `QuadraticFrog`  haciendo doble "click" en el archivo `QuadraticFrog.pro` que se encuentra en la carpeta `Documents/eip/Expressions-QuadraticFrog` de tu computadora. También puedes ir a `http://bitbucket.org/eip-uprrp/expressions-quadraticfrog` para descargar la carpeta `QuadraticFrog` a tu computadora.
 
 2. Configura el proyecto y ejecuta el programa marcando la flecha verde en el menú de la izquierda de la ventana de Qt Creator. El programa te dará un mensaje que dice que la fórmula cuadrática está mal escrita. Esto sucede porque el programa tiene instrucciones que prueban el programa y verifican que la implementación del código esté correcta. Tu programa aún no tiene las instrucciones para evaluar la fórmula cuadrática y por esto sale el mensaje. 
 
 
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 ---
 
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 1.   Double click the file `QuadraticFrog.pro` that is contained in the `Documents/eip/Expressions-QuadraticFrog` folder to load the project `QuadraticFrog` into Qt. You can also download the folder `Expressions-QuadraticFrog` from  `http://bitbucket.org/eip-uprrp/expressions-quadraticfrog`.
 
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 2. Configure the project and run the program by clicking the green arrow in the menu on the left side of the Qt Creator window. The program will display a message saying that the quadratic formula is wrong. This happens because the program has testing instructions that verify that the code implementation is correct. Your program is missing the code for the quadratic formula and this is why the message is displayed.
 
 3. You will write the equations for the quadratic formula in the file In the file  `QuadraticFormula.cpp` (in `Sources`). In the function  `QuadraticPlus` add the equation
 
     The other files of the project have code that will test your equations by evaluating several choices for $$a, b, c$$ and verifying that the equations produce the expected result. Code validation is an important part of software development.
 
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 4. Run the program by clicking the green arrow in the menu on the left side of the Qt Creator window. If your equations are implemented correclty, you should obtain a window similar to the one in Figure 2.
 
     ---
 
     ---
 
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 5. Use "Deliver 1" in Moodle to submit the file  `QuadraticFormula.cpp` containing the code with the functions `QuadraticPlus` and `QuadraticMinus`. Remember to use good programming practices, to include the names of the programmers and to document your program.
 
 6. To play, the frog should leap jump from one leaf to another. Note that the leaves have values for $$x_1$$ and $$x_2$$. These values represent the intersects of the parabola with the $$x$$-axis. You should input the values for the coefficients $$a, b, c$$ of the quadratic equation so that its graph that is a parabola that opens down and intersects the $$x$$-axis in the values $$x_1, x_2$$ shown in the leaves. You can obtain these values noting that