series: Regenerate README.md with new hints

exercises/series/.meta/solutions/hints.md → exercises/series/.meta/hints.md

@@ -1,2 +1,2 @@
-In this exercise you're practicing iterating over an array, meaning: executing an operation on each element of an array. Ruby has many useful built-in methods for iterations. Take a look at [this article](http://jeromedalbert.com/ruby-how-to-iterate-the-right-way/). 
-Most of the methods listed in the article are not methods specifically for Array, but come from [Enumerable](https://ruby-doc.org/core/Enumerable.html). The article doesn't list iterating over _consecutive elements_. The first challenge is to find a method that does.  
+In this exercise you're practicing iterating over an array, meaning: executing an operation on each element of an array. Ruby has many useful built-in methods for iterations. Take a look at [this article](http://jeromedalbert.com/ruby-how-to-iterate-the-right-way/).
+Most of the methods listed in the article are not methods specifically for Array, but come from [Enumerable](https://ruby-doc.org/core/Enumerable.html). The article doesn't list iterating over _consecutive elements_. The first challenge is to find a method that does.

exercises/series/README.md

@@ -20,6 +20,10 @@ whatever you get.
 Note that these series are only required to occupy *adjacent positions*
 in the input; the digits need not be *numerically consecutive*.
 
+In this exercise you're practicing iterating over an array, meaning: executing an operation on each element of an array. Ruby has many useful built-in methods for iterations. Take a look at [this article](http://jeromedalbert.com/ruby-how-to-iterate-the-right-way/).
+Most of the methods listed in the article are not methods specifically for Array, but come from [Enumerable](https://ruby-doc.org/core/Enumerable.html). The article doesn't list iterating over _consecutive elements_. The first challenge is to find a method that does.
+
+
 * * * *
 
 For installation and learning resources, refer to the