Merge pull request #933 from uristdwarf/patch-1

has-city: Specify type of paramaters/return values

subjects/has-city/README.md

@@ -2,10 +2,9 @@
 
 ### Instructions
 
-Create a function `hasCity` that takes a country and an array of cities
-of that country and it returns a new function. \
-The new function takes a city parameter which returns
-whether a city is part of that country or not.
+Create a function `hasCity` that takes a string called `country` and an array of strings, which are cities of that country, which returns a new function. \
+The new function takes a string, called `city`, as a parameter and which determines
+whether the array contains that string or not.
 
-If it is, it should be returned `<city> is a city from <country>`, otherwise
+If it does, it should return the string `<city> is a city from <country>`, otherwise
 `<city> is not a city from <country>`.