Update

calculus.md

@@ -67,7 +67,7 @@ Here it is shown graphically:
 ```
     tangent /      __
       line /     .'  ''..
-          /  __.'f(x)    
+          /  __.'f(x)
          /-''
         /|
    __../:|dy
@@ -113,7 +113,7 @@ Its graph looks like this:
       :|          :
      3 +         :
        |:       :
-     2 + '.._..' 
+     2 + '.._..'
        |
      1 +
        |
@@ -129,7 +129,7 @@ To differentiate this function we only need to know (from the table above) that
 So *x^2* became *2 * x*, *-2 * x* became just -2 (because *x^0 = 1*) and *3* just disappeared (this always happens to additive constants -- notice that such constants don't affect the function's slope in any way, so that's why). The graph of the derivative looks like this:
 
 ```
-       |        
+       |
      2 +        /
        |       /
      1 +      /
@@ -272,7 +272,7 @@ double integral(double (*f)(double), double x)
     steps--;
     x += DX;
   }
-  
+
   return flip ? -1 * r : r;
 }
 
@@ -293,7 +293,7 @@ int main(void)
   for (int i = 0; i < GRAPH_RESX * GRAPH_RESY; ++i)
     graphImage[i] = (i % GRAPH_RESX) == GRAPH_RESX / 2 ? ':' :
       ((i / GRAPH_RESX) == GRAPH_RESY / 2 ? '-' : ' ');
- 
+
   // now plot the function, its derivative and integral
   for (double x = -1 * GRAPH_SIZE; x < GRAPH_SIZE;
     x += GRAPH_SIZE / (2 * GRAPH_RESX))
@@ -301,7 +301,7 @@ int main(void)
     graphDraw(x,integral(f,x),'#');
     graphDraw(x,derivative(f,x),'*');
     graphDraw(x,f(x),'x');
-  }  
+  }
 
   // draw the graph:
   for (int i = 0; i < GRAPH_RESX * GRAPH_RESY; ++i)