Typo correction

Iterators and Generators.ipynb

@@ -74,7 +74,7 @@
     "\n",
     "Generators are best for calculating large sets of results (particularly in calculations that involve loops themselves) in cases where we don’t want to allocate the memory for all of the results at the same time. \n",
     "\n",
-    "As we've noted in previous lectures (such as range()) many Standard Library functions that return lists in Python 2 have been modified to return generators in Python 3 because generators.\n",
+    "As we've noted in previous lectures (such as range()) many Standard Library functions that return lists in Python 2 have been modified to return generators in Python 3.\n",
     "\n",
     "Lets create another example generator which calculates [fibonacci](https://en.wikipedia.org/wiki/Fibonacci_number) numbers:"
    ]
@@ -183,7 +183,7 @@
     "Notice that if we call some huge value of n (like 100000) the second function will have to keep track of every single result, when in our case we actually only care about the previous result to generate the next one!\n",
     "\n",
     "##next() and iter() built-in functions\n",
-    "A key to fully understanding generators is the next function() and the iter() function.\n",
+    "A key to fully understanding generators is the next() function and the iter() function.\n",
     "\n",
     "The next function allows us to access the next element in a sequence. Lets check it out:"
    ]