23 Start new section for shell customization

Wentzell · Wentzell · commit adf1644180c2 · 2022-07-21T16:00:15.000-04:00
diff --git a/23_CommandLine/main.md b/23_CommandLine/main.md
@@ -517,6 +517,7 @@ Control the number of threads for parallel programs.
 | `CPATH`                 | Searched for C/C++ header files           |
 
 
+
 ## Shell Customization
 
 ### Dylan Simon (SCC)
