Update tutorial content for consistency by improving alt text and code formatting in multiple files

Author: nikoscham

index.html

@@ -58,14 +58,14 @@ <h1 class="top">
     <div id="banner">
       <img
         src="./assets/HeatConduction2DFinResults.png"
-        alt="Results of heat conduction in a two-dimensional fin tutorial"
+        alt="Results of heat conduction in a 2D fin tutorial"
       />
       <p class="image-caption">
         <a href="https://feascript.com/tutorials/HeatConduction2DFin.html">Solid heat conduction</a> solver
       </p>
       <img
         src="./assets/SolidificationFront2DResults.png"
-        alt="Results of solidification front propagation in a two-dimensional domain"
+        alt="Results of solidification front propagation in a 2D domain tutorial"
       />
       <p class="image-caption">
         <a href="https://feascript.com/tutorials/SolidificationFront2D.html"

tutorials/HeatConduction1DWall.html

@@ -183,7 +183,7 @@ <h2 id="solvingwithfeascript"><a name="Solving with FEAScript"></a>Solving with
 &lt;/body&gt;</pre
     >
     <p>
-      The "solutionPlot" is the id of the div where the plot will be rendered. This id is passed as an
+      The <code>"solutionPlot"</code> is the id of the div where the plot will be rendered. This id is passed as an
       argument to the "plotSolution" function to specify the target div for the plot.
     </p>
 

tutorials/HeatConduction2DFin.html

@@ -192,7 +192,7 @@ <h2 id="solvingwithfeascript"><a name="Solving with FEAScript"></a>Solving with
 &lt;/body&gt;</pre
     >
     <p>
-      The "solutionPlot" is the id of the div where the plot will be rendered. This id is passed as an
+      The <code>"solutionPlot"</code> is the id of the div where the plot will be rendered. This id is passed as an
       argument to the "plotSolution" function to specify the target div for the plot.
     </p>
 

tutorials/SolidificationFront2D.html

@@ -199,7 +199,7 @@ <h2 id="solvingwithfeascript"><a name="Solving with FEAScript"></a>Solving with
 &lt;/body&gt;</pre
     >
     <p>
-      The "solutionPlot" is the id of the div where the plot will be rendered. This id is passed as an
+      The <code>"solutionPlot"</code> is the id of the div where the plot will be rendered. This id is passed as an
       argument to the "plotSolution" function to specify the target div for the plot.
     </p>