Relative distance fix (#2566)

* Link horizontally between siblings, no arrows

* Describe why Kevin Bacon is referred

* Specific group of people around Kevin Bacon

Author: mk-mxp

exercises/relative-distance/instructions.md

@@ -1,6 +1,7 @@
 # Instructions
 
 Your task is to determine the degree of separation between two individuals in a family tree.
+This is similar to the pop culture idea that every Hollywood actor is [within six degrees of Kevin Bacon][six-bacons].
 
 - You will be given an input, with all parent names and their children.
 - Each name is unique, a child _can_ have one or two parents.
@@ -13,22 +14,21 @@ Your task is to determine the degree of separation between two individuals in a
 Given the following family tree:
 
 ```text
-      ┌──────────┐            ┌──────────┐ ┌───────────┐
-      │  Helena  │            │  Erdős   │ │  Shusaku  │
-      └───┬───┬──┘            └─────┬────┘ └──────┬────┘
-      ┌───┘   └───────┐             └──────┬──────┘
-      ▼               ▼                    ▼
-┌──────────┐     ┌────────┐          ┌──────────┐
-│   Isla   │     │  Tariq │          │   Kevin  │
-└────┬─────┘     └────┬───┘          └──────────┘
-     ▼                ▼
-┌─────────┐      ┌────────┐
+      ┌──────────┐            ┌──────────┐     ┌───────────┐
+      │  Helena  │            │  Erdős   ├─────┤  Shusaku  │
+      └───┬───┬──┘            └─────┬────┘     └────┬──────┘
+      ┌───┘   └───────┐             └───────┬───────┘
+┌─────┴────┐     ┌────┴───┐           ┌─────┴────┐
+│   Isla   ├─────┤ Tariq  │           │   Kevin  │
+└────┬─────┘     └────┬───┘           └──────────┘
+     │                │
+┌────┴────┐      ┌────┴───┐
 │   Uma   │      │ Morphy │
 └─────────┘      └────────┘
 ```
 
-The degree of separation between Tariq and Uma is 3 (Tariq → Helena → Isla → Uma).
-There's no known relationship between Isla and [Kevin][six-bacons], as there is no connection in the given data.
+The degree of separation between Tariq and Uma is 2 (Tariq → Isla → Uma).
+There's no known relationship between Isla and Kevin, as there is no connection in the given data.
 The degree of separation between Uma and Isla is 1.
 
 ~~~~exercism/note