markdown source builds

Auto-generated via `{sandpaper}`
Source  : 2a698e6
Branch  : main
Author  : Kate Taylor <156236911+TaylorKT@users.noreply.github.com>
Time    : 2025-06-27 17:33:41 +0000
Message : Added definitions of . and .. (#367)

We added a text description of . and .. before using .. with cd

Author: actions-user

02-the-filesystem.md

@@ -52,7 +52,7 @@ Your computer looked for a directory or file called `shell_data` within the
 directory you were already in. It didn't know you wanted to look at a directory level
 above the one you were located in.
 
-We have a special command to tell the computer to move us back or up one directory level.
+We have two special directory names `.` and `..`; `.` refers to the current directory you are in and `..` refers to the directory one level above the current directory. We can use `..` with `cd` to move up one directory level.
 
 ```bash
 $ cd ..

md5sum.txt

@@ -4,7 +4,7 @@
 "config.yaml" "85dd4502ec34eb1f4ec3dd3f04a061b8" "site/built/config.yaml" "2023-05-08"
 "index.md" "9fee7090c3acb6ad50fe0dbccf38d31f" "site/built/index.md" "2024-08-15"
 "episodes/01-introduction.md" "c0f3f85bf71bfaf19c2b3507d0207378" "site/built/01-introduction.md" "2023-08-15"
-"episodes/02-the-filesystem.md" "70b53ce6f53a88f931e492d876c60fa1" "site/built/02-the-filesystem.md" "2023-05-08"
+"episodes/02-the-filesystem.md" "4bbcb23704aa18eb9155a4b80c0997e9" "site/built/02-the-filesystem.md" "2025-06-27"
 "episodes/03-working-with-files.md" "2c331035e2e8cea65fc0386b2e59b303" "site/built/03-working-with-files.md" "2025-05-30"
 "episodes/04-redirection.md" "7af92ffeb1bfdc69057917967d8a51ad" "site/built/04-redirection.md" "2025-05-30"
 "episodes/05-writing-scripts.md" "648b54fd474490d69a6177a239be29d3" "site/built/05-writing-scripts.md" "2024-04-17"