Sync docs (luhn, triangle) and metadata (allergies, isogram, …

exercises/practice/allergies/.meta/config.json

@@ -15,5 +15,5 @@
   },
   "blurb": "Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.",
   "source": "Exercise by the JumpstartLab team for students at The Turing School of Software and Design.",
-  "source_url": "https://turing.edu"
+  "source_url": "https://www.turing.edu/"
 }

exercises/practice/isogram/.meta/config.json

@@ -13,7 +13,7 @@
       ".meta/example.gd"
     ]
   },
-  "blurb": "Determine if a word or phrase is an isogram.",
+  "blurb": "Determine whether a phrase is an isogram, a word with no repeated letters.",
   "source": "Wikipedia",
   "source_url": "https://en.wikipedia.org/wiki/Isogram"
 }

exercises/practice/luhn/.docs/instructions.md

@@ -41,7 +41,7 @@ If the sum is evenly divisible by 10, the original number is valid.
 
 ### Invalid Canadian SIN
 
-The number to be checked is `066 123 468`.
+The number to be checked is `066 123 478`.
 
 We start at the end of the number and double every second digit, beginning with the second digit from the right and moving left.
 

exercises/practice/pangram/.meta/config.json

@@ -13,7 +13,7 @@
       ".meta/example.gd"
     ]
   },
-  "blurb": "Determine if a sentence is a pangram.",
+  "blurb": "Determine whether a phrase uses every letter in the Latin alphabet.",
   "source": "Wikipedia",
   "source_url": "https://en.wikipedia.org/wiki/Pangram"
 }

exercises/practice/reverse-string/.meta/config.json

@@ -15,5 +15,5 @@
   },
   "blurb": "Reverse a given string.",
   "source": "Introductory challenge to reverse an input string",
-  "source_url": "https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb"
+  "source_url": "https://www.freecodecamp.org/news/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb"
 }

exercises/practice/space-age/.meta/config.json

@@ -15,5 +15,5 @@
   },
   "blurb": "Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.",
   "source": "Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial.",
-  "source_url": "https://pine.fm/LearnToProgram/?Chapter=01"
+  "source_url": "https://pine.fm/LearnToProgram/chap_01.html"
 }

exercises/practice/triangle/.docs/instructions.md

@@ -13,6 +13,12 @@ A _scalene_ triangle has all sides of different lengths.
 
 For a shape to be a triangle at all, all sides have to be of length > 0, and the sum of the lengths of any two sides must be greater than or equal to the length of the third side.
 
+~~~~exercism/note
+_Degenerate triangles_ are triangles where the sum of the length of two sides is **equal** to the length of the third side, e.g. `1, 1, 2`.
+We opted to not include tests for degenerate triangles in this exercise.
+You may handle those situations if you wish to do so, or safely ignore them.
+~~~~
+
 In equations:
 
 Let `a`, `b`, and `c` be sides of the triangle.

exercises/practice/triangle/.meta/config.json

@@ -15,5 +15,5 @@
   },
   "blurb": "Determine if a triangle is equilateral, isosceles, or scalene.",
   "source": "The Ruby Koans triangle project, parts 1 & 2",
-  "source_url": "https://web.archive.org/web/20220831105330/http://rubykoans.com"
+  "source_url": "https://www.rubykoans.com/"
 }