fix build

Author: brownsarahm

notes/2023-09-21.md

@@ -487,9 +487,7 @@ It wrote over.  One `>` writes to the file in overwrite mode.
 
 ````{margin}
 ```{tip}
-## Conceptual Connection
-
-
+**Conceptual Connection**
 
 When we open a file in a program we use functions like
 - `fopen` in C
@@ -504,7 +502,7 @@ typically we also have to tell it what *mode* to open the file with, and some op
 
 
 
-References
+**References**
 
 - [C language docs from IBM](https://www.ibm.com/docs/en/zos/2.2.0?topic=functions-fopen-open-file)
 - [Python official docs](https://docs.python.org/3/library/functions.html#open)
@@ -516,7 +514,7 @@ References
 ````
 
 ```{note}
-**mode** this is a good vocab term that could be added to the site glossary for a community badge
+**mode**  is a good vocab term that could be added to the site glossary for a community badge
 ```
 
 ## Recovering from mistakes with git restore

notes/2023-10-12.md

@@ -178,7 +178,7 @@ Remmeber the `.gitignore` file lives **outside** of the `.git` directory because
 
 ## Creating a repo from scratch
 
----
++++
 
 We will start in the top level course directory.
 ```{code-cell} bash