Sync the pig-latin exercise's docs with the latest data. (#749)

exercises/practice/pig-latin/.docs/instructions.md

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 # Instructions
 
-Implement a program that translates from English to Pig Latin.
+Your task is to translate text from English to Pig Latin using the following rules:
 
-Pig Latin is a made-up children's language that's intended to be confusing.
-It obeys a few simple rules (below), but when it's spoken quickly it's really difficult for non-children (and non-native speakers) to understand.
-
-- **Rule 1**: If a word begins with a vowel sound, add an "ay" sound to the end of the word.
+- **Rule 1**: If a word begins with a vowel sound, add an "ay" sound to the end of the word (e.g. "apple" -> "appleay").
   Please note that "xr" and "yt" at the beginning of a word make vowel sounds (e.g. "xray" -> "xrayay", "yttria" -> "yttriaay").
-- **Rule 2**: If a word begins with a consonant sound, move it to the end of the word and then add an "ay" sound to the end of the word.
+- **Rule 2**: If a word begins with a consonant sound, move it to the end of the word and then add an "ay" sound to the end of the word (e.g. "pig" -> "igpay").
   Consonant sounds can be made up of multiple consonants, such as the "ch" in "chair" or "st" in "stand" (e.g. "chair" -> "airchay").
-- **Rule 3**: If a word starts with a consonant sound followed by "qu", move it to the end of the word, and then add an "ay" sound to the end of the word (e.g. "square" -> "aresquay").
+- **Rule 3**: If a word starts with a consonant sound followed by "qu", move them to the end of the word, and then add an "ay" sound to the end of the word (e.g. "square" -> "aresquay").
 - **Rule 4**: If a word contains a "y" after a consonant cluster or as the second letter in a two letter word it makes a vowel sound (e.g. "rhythm" -> "ythmrhay", "my" -> "ymay").
-
-There are a few more rules for edge cases, and there are regional variants too.
-Check the tests for all the details.
-
-Read more about [Pig Latin on Wikipedia][pig-latin].
-
-[pig-latin]: https://en.wikipedia.org/wiki/Pig_latin

exercises/practice/pig-latin/.docs/introduction.md

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+# Introduction
+
+Your parents have challenged you and your sibling to a game of two-on-two basketball.
+Confident they'll win, they let you score the first couple of points, but then start taking over the game.
+Needing a little boost, you start speaking in [Pig Latin][pig-latin], which is a made-up children's language that's difficult for non-children to understand.
+This will give you the edge to prevail over your parents!
+
+[pig-latin]: https://en.wikipedia.org/wiki/Pig_latin