Update intro.ipynb (#969)

intro.ipynb

@@ -62,7 +62,7 @@
    "source": [
     "From there, the notebook alternates explanations with examples of use. You can run the examples as they are, and you can modify the code cells (or add new cells) and run your own examples. If you have some really good examples to add, you can make a github pull request.\n",
     "\n",
-    "If you want to see the source code of a function, you can open a browser or editor and see it in another window, or from within the notebook you can use the IPython magic function `%psource` (for \"print source\") or the function `psource` from `notebook.py`. Also, if the algorithm has pseudocode, you can read it by calling the `pseudocode` function with input the name of the algorithm."
+    "If you want to see the source code of a function, you can open a browser or editor and see it in another window, or from within the notebook you can use the IPython magic function `%psource` (for \"print source\") or the function `psource` from `notebook.py`. Also, if the algorithm has pseudocode available, you can read it by calling the `pseudocode` function with the name of the algorithm passed as a parameter."
    ]
   },
   {