Sync docs (#2789)

exercises/practice/matching-brackets/.docs/instructions.md

@@ -1,4 +1,5 @@
 # Instructions
 
 Given a string containing brackets `[]`, braces `{}`, parentheses `()`, or any combination thereof, verify that any and all pairs are matched and nested correctly.
-The string may also contain other characters, which for the purposes of this exercise should be ignored.
+Any other characters should be ignored.
+For example, `"{what is (42)}?"` is balanced and `"[text}"` is not.

exercises/practice/matching-brackets/.docs/introduction.md

@@ -0,0 +1,8 @@
+# Introduction
+
+You're given the opportunity to write software for the Bracketeer™, an ancient but powerful mainframe.
+The software that runs on it is written in a proprietary language.
+Much of its syntax is familiar, but you notice _lots_ of brackets, braces and parentheses.
+Despite the Bracketeer™ being powerful, it lacks flexibility.
+If the source code has any unbalanced brackets, braces or parentheses, the Bracketeer™ crashes and must be rebooted.
+To avoid such a scenario, you start writing code that can verify that brackets, braces, and parentheses are balanced before attempting to run it on the Bracketeer™.

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

@@ -1,20 +1,10 @@
 # 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

exercises/practice/space-age/.docs/instructions.md

@@ -1,25 +1,28 @@
 # Instructions
 
-Given an age in seconds, calculate how old someone would be on:
+Given an age in seconds, calculate how old someone would be on a planet in our Solar System.
 
-- Mercury: orbital period 0.2408467 Earth years
-- Venus: orbital period 0.61519726 Earth years
-- Earth: orbital period 1.0 Earth years, 365.25 Earth days, or 31557600 seconds
-- Mars: orbital period 1.8808158 Earth years
-- Jupiter: orbital period 11.862615 Earth years
-- Saturn: orbital period 29.447498 Earth years
-- Uranus: orbital period 84.016846 Earth years
-- Neptune: orbital period 164.79132 Earth years
+One Earth year equals 365.25 Earth days, or 31,557,600 seconds.
+If you were told someone was 1,000,000,000 seconds old, their age would be 31.69 Earth-years.
 
-So if you were told someone were 1,000,000,000 seconds old, you should
-be able to say that they're 31.69 Earth-years old.
+For the other planets, you have to account for their orbital period in Earth Years:
 
-If you're wondering why Pluto didn't make the cut, go watch [this YouTube video][pluto-video].
+| Planet  | Orbital period in Earth Years |
+| ------- | ----------------------------- |
+| Mercury | 0.2408467                     |
+| Venus   | 0.61519726                    |
+| Earth   | 1.0                           |
+| Mars    | 1.8808158                     |
+| Jupiter | 11.862615                     |
+| Saturn  | 29.447498                     |
+| Uranus  | 84.016846                     |
+| Neptune | 164.79132                     |
 
-Note: The actual length of one complete orbit of the Earth around the sun is closer to 365.256 days (1 sidereal year).
+~~~~exercism/note
+The actual length of one complete orbit of the Earth around the sun is closer to 365.256 days (1 sidereal year).
 The Gregorian calendar has, on average, 365.2425 days.
 While not entirely accurate, 365.25 is the value used in this exercise.
 See [Year on Wikipedia][year] for more ways to measure a year.
 
-[pluto-video]: https://www.youtube.com/watch?v=Z_2gbGXzFbs
 [year]: https://en.wikipedia.org/wiki/Year#Summary
+~~~~

exercises/practice/space-age/.docs/introduction.md

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+# Introduction
+
+The year is 2525 and you've just embarked on a journey to visit all planets in the Solar System (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune).
+The first stop is Mercury, where customs require you to fill out a form (bureaucracy is apparently _not_ Earth-specific).
+As you hand over the form to the customs officer, they scrutinize it and frown.
+"Do you _really_ expect me to believe you're just 50 years old?
+You must be closer to 200 years old!"
+
+Amused, you wait for the customs officer to start laughing, but they appear to be dead serious.
+You realize that you've entered your age in _Earth years_, but the officer expected it in _Mercury years_!
+As Mercury's orbital period around the sun is significantly shorter than Earth, you're actually a lot older in Mercury years.
+After some quick calculations, you're able to provide your age in Mercury Years.
+The customs officer smiles, satisfied, and waves you through.
+You make a mental note to pre-calculate your planet-specific age _before_ future customs checks, to avoid such mix-ups.
+
+~~~~exercism/note
+If you're wondering why Pluto didn't make the cut, go watch [this YouTube video][pluto-video].
+
+[pluto-video]: https://www.youtube.com/watch?v=Z_2gbGXzFbs
+~~~~

exercises/practice/yacht/.docs/instructions.md

@@ -1,8 +1,12 @@
 # Instructions
 
-The dice game [Yacht][yacht] is from the same family as Poker Dice, Generala and particularly Yahtzee, of which it is a precursor.
-In the game, five dice are rolled and the result can be entered in any of twelve categories.
-The score of a throw of the dice depends on category chosen.
+Given five dice and a category, calculate the score of the dice for that category.
+
+~~~~exercism/note
+You'll always be presented with five dice.
+Each dice's value will be between one and six inclusively.
+The dice may be unordered.
+~~~~
 
 ## Scores in Yacht
 
@@ -21,15 +25,6 @@ The score of a throw of the dice depends on category chosen.
 | Choice          | Sum of the dice        | Any combination                          | 2 3 3 4 6 scores 18 |
 | Yacht           | 50 points              | All five dice showing the same face      | 4 4 4 4 4 scores 50 |
 
-If the dice do not satisfy the requirements of a category, the score is zero.
+If the dice do **not** satisfy the requirements of a category, the score is zero.
 If, for example, _Four Of A Kind_ is entered in the _Yacht_ category, zero points are scored.
 A _Yacht_ scores zero if entered in the _Full House_ category.
-
-## Task
-
-Given a list of values for five dice and a category, your solution should return the score of the dice for that category.
-If the dice do not satisfy the requirements of the category your solution should return 0.
-You can assume that five values will always be presented, and the value of each will be between one and six inclusively.
-You should not assume that the dice are ordered.
-
-[yacht]: https://en.wikipedia.org/wiki/Yacht_(dice_game)

exercises/practice/yacht/.docs/introduction.md

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+# Introduction
+
+Each year, something new is "all the rage" in your high school.
+This year it is a dice game: [Yacht][yacht].
+
+The game of Yacht is from the same family as Poker Dice, Generala and particularly Yahtzee, of which it is a precursor.
+The game consists of twelve rounds.
+In each, five dice are rolled and the player chooses one of twelve categories.
+The chosen category is then used to score the throw of the dice.
+
+[yacht]: https://en.wikipedia.org/wiki/Yacht_(dice_game)