adding the poll question

lectures/08_vector_implementation/README.md

@@ -217,11 +217,11 @@ The destructor is called implicitly when an automatically-allocated object goes
 
 Match up the line of code with the function that is called. Each letter is used exactly once.
 
-| Foo f1;	     |		a) assignment operator  
-| Foo\* f2; 	     |		b) destructor  
-| f2 = new Foo(f1);  |		c) copy constructor  
-| f1 = \*f2;	     |		d) default constructor 
-| delete f2;	     |		e) none of the above  
+Foo f1;                     a) assignment operator  
+Foo\* f2;                   b) destructor  
+f2 = new Foo(f1);           c) copy constructor  
+f1 = \*f2;                  d) default constructor 
+delete f2;                  e) none of the above  
 
 ## 8.15 Leetcode Exercises