Update src/8_many_atoms_sol.md

src/8_many_atoms_sol.md

@@ -75,6 +75,7 @@ pyplot.fill_between([-3*pi,3*pi], -np.abs(t1-t2), np.abs(t1-t2), color='red',alp
 
 pyplot.legend(loc='lower center');
 ```
+(Press the magic wand tool to enable the python code that created the figure to see what happends if you change $t_1$ and $t_2$.)
 
-Notice that the red shaded area is not a part *Band structure* anymore!
+Notice that the red shaded area is not a part of the *Band structure* anymore!