Community feedback

[hectorsector]

Reported by @derp-derp-derp in the GitHub community forum:

1. https://github.com/derp-derp-derp/intro-react/pull/2#pullrequestreview-382243172
   Here it says "Then, at the bottom of our render method, we loop through out this.props.currList." I think that's supposed to say "we loop through our".

2. https://github.com/derp-derp-derp/intro-react/pull/2#pullrequestreview-382252223
   Here it says "Take at the method on line 30 in src/App.jsx". I think that's supposed to say "Take a look at".

3. https://github.com/derp-derp-derp/intro-react/pull/2#pullrequestreview-382252256
   Here it says "git commit -m "create addStudents method". The method is actually called addStudent, singular.

4. https://github.com/derp-derp-derp/intro-react/pull/2#pullrequestreview-382258873
   Here it says "Navigate to src/List.jsx and take a look at the code between lines 18 and 25 in src/List.jsx.". The last bit " in src/List.jsx" seems redundant.

5. At the end of the course there's a warning in the console "Warning: Each child in a list should have a unique “key” prop" forsrc/Table.jsx: https://imgur.com/a/xZsz3zn
   Here's the fix for that: https://github.com/derp-derp-derp/intro-react/pull/2/commits/bf4a32e1af0ec36f19fe4a398ee1d90a0dc1895...