Merge pull request #35 from andreww/patch-1

04-data-types-and-format.md "Names" -> "Name"

Author: wood-chris

_episodes/04-data-types-and-format.md

@@ -321,7 +321,7 @@ This is a convenient place to highlight that the `apply` method is one way to ru
 the Buoy Station Names, we can write:
 
 ~~~
-waves_df["Names"].apply(len)
+waves_df["Name"].apply(len)
 ~~~
 {: .language-python}