fix issue with the flowchart page

Author: chrisorban

docs/flowchart.html

@@ -256,7 +256,7 @@ <h2 class="anchored" data-anchor-id="astronomy-activities">Astronomy activities<
 <p></p><figure class="figure"><p></p>
 <div>
 <pre class="mermaid mermaid-js">flowchart LR
-  A[Slingshot with Gravity!] --&gt; B[Orbital Motion: Kepler's 2nd law]
+  A[Slingshot with Gravity!] --&gt; B["Orbital Motion: &lt;br&gt;Kepler's 2nd law"]
   A --&gt; C[Orbital Motion: Eccentricity]
   A --&gt; D[Exoplanets!]
 </pre>

docs/search.json

@@ -1572,7 +1572,7 @@
     "href": "flowchart.html#astronomy-activities",
     "title": "Activity Flowcharts / Prerequisites",
     "section": "Astronomy activities",
-    "text": "Astronomy activities\nSlingshot with gravity is a demonstration of Kepler’s 1st law (Law of Ellipses). Orbital Motion: Kepler’s 2nd law includes a challenge relating to Kepler’s 3rd law (Law of Periods)\n\n\n\n\n\nflowchart LR\n  A[Slingshot with Gravity!] --> B[Orbital Motion: Kepler's 2nd law]\n  A --> C[Orbital Motion: Eccentricity]\n  A --> D[Exoplanets!]\n\n\n\n\n\n\nNote: Slingshot with Gravity contains some trigonometry, but the activities that follow it do not\n\nProject Mercury (Hidden Figures celebration)\nProject Mercury (Part 1. Circular Orbit) contains much of the same code as Slingshot with Gravity, but the tasks only involve changing the parameters. The main math concept required is some algebra and taking a square root, so it can be used in less advanced classes. By contrast, Project Mercury (Part 2. Reentry) is significantly more difficult with changes to the code and algebra 2 or pre-calculus level calculations.\n\n\n\n\n\nflowchart LR\n  A[\"Project Mercury <br> (Part 1. Circular Orbit)\"] --> B[\"Project Mercury <br>(Part 2. Reentry)\"]\n\n\n\n\n\n\n\n\nOther Astronomy activities\nEscape Velocity / Newtonian Black Holes uses much of the same code as Slingshot with Gravity, but arguably one can skip Slingshot with Gravity and jump into Escape Velocity / Newtonian Black Holes.\nNight sky simulator is not a gravity simulation so there are no pre-requisites for that activity other than some familiarity with programming and p5.js"
+    "text": "Astronomy activities\nSlingshot with gravity is a demonstration of Kepler’s 1st law (Law of Ellipses). Orbital Motion: Kepler’s 2nd law includes a challenge relating to Kepler’s 3rd law (Law of Periods)\n\n\n\n\n\nflowchart LR\n  A[Slingshot with Gravity!] --> B[\"Orbital Motion: <br>Kepler's 2nd law\"]\n  A --> C[Orbital Motion: Eccentricity]\n  A --> D[Exoplanets!]\n\n\n\n\n\n\nNote: Slingshot with Gravity contains some trigonometry, but the activities that follow it do not\n\nProject Mercury (Hidden Figures celebration)\nProject Mercury (Part 1. Circular Orbit) contains much of the same code as Slingshot with Gravity, but the tasks only involve changing the parameters. The main math concept required is some algebra and taking a square root, so it can be used in less advanced classes. By contrast, Project Mercury (Part 2. Reentry) is significantly more difficult with changes to the code and algebra 2 or pre-calculus level calculations.\n\n\n\n\n\nflowchart LR\n  A[\"Project Mercury <br> (Part 1. Circular Orbit)\"] --> B[\"Project Mercury <br>(Part 2. Reentry)\"]\n\n\n\n\n\n\n\n\nOther Astronomy activities\nEscape Velocity / Newtonian Black Holes uses much of the same code as Slingshot with Gravity, but arguably one can skip Slingshot with Gravity and jump into Escape Velocity / Newtonian Black Holes.\nNight sky simulator is not a gravity simulation so there are no pre-requisites for that activity other than some familiarity with programming and p5.js"
   },
   {
     "objectID": "flowchart.html#electromagnetism-activities",

flowchart.qmd

@@ -45,7 +45,7 @@ Slingshot with gravity is a demonstration of Kepler's 1st law (Law of Ellipses).
 
 ```{mermaid}
 flowchart LR
-  A[Slingshot with Gravity!] --> B[Orbital Motion: Kepler's 2nd law]
+  A[Slingshot with Gravity!] --> B["Orbital Motion: <br>Kepler's 2nd law"]
   A --> C[Orbital Motion: Eccentricity]
   A --> D[Exoplanets!]
 ```