equation error

book/basic-features/equations.md

@@ -1,6 +1,8 @@
 # Equations
 
-Equations can be included in two ways: inline or display mode. To make an inline equation, just put the LaTeX equation between \$-signs. For example, `$F = m \cdot a$` produces: $F = m \cdot a$. 
+Equations can be included in two ways: inline or display mode. 
+
+To make an inline equation, just put the LaTeX equation between \$-signs. For example, `$F = m \cdot a$` produces: $F = m \cdot a$. 
 
 Display mode equations (the ones that take up a whole line), can be inserted using double \$-signs, like this:
 
@@ -35,9 +37,9 @@ Resulting in:
 
 $$
     F = m \cdot a
-$$ (newtons_second_law)
+$$ (newtons_second_law_2)
 
-Equation {eq}`newtons_second_law` can now be referred to.
+Equation {eq}`newtons_second_law_2` can now be referred to.
 
 > **Note**
 > 

book/workflows/edit_book.md

@@ -158,23 +158,25 @@ Demonstration, video available [here](https://youtu.be/bThimdDRXTc)
 
 1. Make some changes to a file in for example VS Code and save them.
 
-2. Select the files ready to be added to Git-timeline (staging) <br>
-For demonstration purposes, we have created a new Markdown file called `new-chapter.md`, which we want to add to the book. Since this is a new file, Git has no knowledge about its existence yet. I.e., the file is *untracked*. To add new files to our repository, we need to *stage* and *commit* them. To do this, open the Source Control menu in the left side bar. Our new file should appear in this menu:
+2. Select the files ready to be added to Git-timeline (staging).
+
+    For demonstration purposes, we have created a new Markdown file called `new-chapter.md`, which we want to add to the book. Since this is a new file, Git has no knowledge about its existence yet. I.e., the file is *untracked*. To add new files to our repository, we need to *stage* and *commit* them. To do this, open the Source Control menu in the left side bar. Our new file should appear in this menu:
 
 ```{figure} ../images/git-new-file.png
 
 The new file appears in the Source Control menu.
 ```
-Notice that there is a green letter U placed besides the file, meaning that our file is untracked. To add a file to the *staging area*, click on the + that appears when you hover over the file. 
+    Notice that there is a green letter U placed besides the file, meaning that our file is untracked. To add a file to the *staging area*, click on the + that appears when you hover over the file. 
 
-3. Adding changes to the Git-timeline (committing) <br>
-Next, in the field that says "Message", write a short description of the changes you have made. This message is what is called the *Commit Message*. After we've done this, the menu should now look something like this:
+3. Adding changes to the Git-timeline (committing)
+
+    Next, in the field that says "Message", write a short description of the changes you have made. This message is what is called the *Commit Message*. After we've done this, the menu should now look something like this:
 
 ```{figure} ../images/git-file-added.png
 
 The new file has been staged, and we've written a Commit Message.
 ```
-Now, we are ready to add the changes to the repository. This is done by *committing* the staged changes. To do this, simply press the big, blue "Commit" button in the Source Control menu. 
+    Now, we are ready to add the changes to the repository. This is done by *committing* the staged changes. To do this, simply press the big, blue "Commit" button in the Source Control menu. 
 
 4. In the bottom left corner, next to the branch name, click the "Synchronize Changes" button (the one that looks like this: 🔄, highlighted in the image below) to push the changes to GitLab.