leap: sync

exercises/practice/leap/.docs/instructions.md

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+# Instructions
+
+Your task is to determine whether a given year is a leap year.

exercises/practice/leap/.docs/introduction.md

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+# Introduction
+
+A leap year (in the Gregorian calendar) occurs:
+
+- In every year that is evenly divisible by 4.
+- Unless the year is evenly divisible by 100, in which case it's only a leap year if the year is also evenly divisible by 400.
+
+Some examples:
+
+- 1997 was not a leap year as it's not divisible by 4.
+- 1900 was not a leap year as it's not divisible by 400.
+- 2000 was a leap year!
+
+~~~~exercism/note
+For a delightful, four-minute explanation of the whole phenomenon of leap years, check out [this YouTube video](https://www.youtube.com/watch?v=xX96xng7sAE).
+~~~~

exercises/practice/leap/.meta/config.json

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+{
+  "authors": [],
+  "files": {
+    "solution": [],
+    "test": [],
+    "example": []
+  },
+  "blurb": "Determine whether a given year is a leap year.",
+  "source": "CodeRanch Cattle Drive, Assignment 3",
+  "source_url": "https://coderanch.com/t/718816/Leap"
+}