minesweeper: sync (#520)

* Sync the `minesweeper` exercise's docs with the latest data.

* Sync the `minesweeper` exercise's metadata with the latest data.

exercises/practice/minesweeper/.docs/instructions.md

@@ -1,35 +1,24 @@
 # Instructions
 
-Add the mine counts to a completed Minesweeper board.
+Your task is to add the mine counts to empty squares in a completed Minesweeper board.
+The board itself is a rectangle composed of squares that are either empty (`' '`) or a mine (`'*'`).
 
-Minesweeper is a popular game where the user has to find the mines using
-numeric hints that indicate how many mines are directly adjacent
-(horizontally, vertically, diagonally) to a square.
+For each empty square, count the number of mines adjacent to it (horizontally, vertically, diagonally).
+If the empty square has no adjacent mines, leave it empty.
+Otherwise replace it with the adjacent mines count.
 
-In this exercise you have to create some code that counts the number of
-mines adjacent to a given empty square and replaces that square with the
-count.
+For example, you may receive a 5 x 4 board like this (empty spaces are represented here with the '·' character for display on screen):
 
-The board is a rectangle composed of blank space (' ') characters. A mine
-is represented by an asterisk ('\*') character.
-
-If a given space has no adjacent mines at all, leave that square blank.
-
-## Examples
-
-For example you may receive a 5 x 4 board like this (empty spaces are
-represented here with the '·' character for display on screen):
-
-```
+```text
 ·*·*·
 ··*··
 ··*··
 ·····
 ```
 
-And your code will transform it into this:
+Which your code should transform into this:
 
-```
+```text
 1*3*1
 13*31
 ·2*2·

exercises/practice/minesweeper/.docs/introduction.md

@@ -0,0 +1,5 @@
+# Introduction
+
+[Minesweeper][wikipedia] is a popular game where the user has to find the mines using numeric hints that indicate how many mines are directly adjacent (horizontally, vertically, diagonally) to a square.
+
+[wikipedia]: https://en.wikipedia.org/wiki/Minesweeper_(video_game)

exercises/practice/minesweeper/.meta/config.json

@@ -16,5 +16,5 @@
       ".meta/uMineSweeperExample.pas"
     ]
   },
-  "blurb": "Add the numbers to a minesweeper board"
+  "blurb": "Add the numbers to a minesweeper board."
 }