triangle: Add new test case for scalene triangles to solve a bug [#2072] (#2075)

* Add new test case for scalene triangles [#2072]

- Added new test case "two unadjacent sides are equal" of [3, 4, 3] for scalene triangles to solve a bug discussed in #2072
- New test case does not have a uuid yet
- The existing scalene triangle test case "two sides are equal" is changed to "two adjacent sides are equal" to distinguish it from the newly added test case

* Add uuid to new test case

* Change scalene triangles' test cases' name

* Add another scalene test case for redundancy

Added the test case "second and third sides are equal" to prevent other possible bugs.

* Correct mistake on "second and third sides are equal" test

Author: kevvnnn

exercises/triangle/canonical-data.json

@@ -184,13 +184,31 @@
         },
         {
           "uuid": "c6e15a92-90d9-4fb3-90a2-eef64f8d3e1e",
-          "description": "two sides are equal",
+          "description": "first and second sides are equal",
           "property": "scalene",
           "input": {
             "sides": [4, 4, 3]
           },
           "expected": false
         },
+        {
+          "uuid": "3da23a91-a166-419a-9abf-baf4868fd985",
+          "description": "first and third sides are equal",
+          "property": "scalene",
+          "input": {
+            "sides": [3, 4, 3]
+          },
+          "expected": false
+        },
+        {
+          "uuid": "b6a75d98-1fef-4c42-8e9a-9db854ba0a4d",
+          "description": "second and third sides are equal",
+          "property": "scalene",
+          "input": {
+            "sides": [4, 3, 3]
+          },
+          "expected": false
+        },
         {
           "uuid": "70ad5154-0033-48b7-af2c-b8d739cd9fdc",
           "description": "may not violate triangle inequality",