Update past posts to use the new markdownified excerpts

_drafts/adding_comments.md

@@ -0,0 +1 @@
+https://carlschwan.eu/2020/12/29/adding-comments-to-your-static-blog-with-mastodon/

_drafts/test.md

@@ -0,0 +1,20 @@
+---
+title: Test post
+excerpt: This is to test stuff out, it should never actually get published!
+layout: post
+image:
+alt: 
+---
+
+<!-- <div class="strava-embed-placeholder" data-embed-type="activity" data-embed-id="9552293688"></div><script src="https://strava-embeds.com/embed.js"></script> -->
+
+<!-- Import the component -->
+<script type="module" src="https://ajax.googleapis.com/ajax/libs/model-viewer/3.1.1/model-viewer.min.js"></script>
+
+<!-- Use it like any other HTML element -->
+<!-- <model-viewer alt="test" src="/assets/blog/toothbrush_shelf/toothbrush_shelf.glb" ar environment-image="" poster="/assets/blog/toothbrush_shelf/spin.gif" shadow-intensity="1" camera-controls touch-action="pan-y"></model-viewer> -->
+
+<!-- <model-viewer> HTML element -->
+<model-viewer src="/assets/blog/toothbrush_shelf/model/toothbrush_shelf.glb" ar ar-modes="webxr scene-viewer quick-look" camera-controls poster="/assets/blog/toothbrush_shelf/model/poster.webp" shadow-intensity="1" auto-rotate camera-orbit="-212.4deg 77.5deg 411.2m" field-of-view="30deg"> </model-viewer>
+<!-- Loads <model-viewer> for browsers: -->
+<script type="module" src="https://ajax.googleapis.com/ajax/libs/model-viewer/3.0.1/model-viewer.min.js"></script>

_posts/2022-07-06-command_line_slides.md

@@ -1,9 +1,9 @@
 ---
 title: Command Line Slides
-excerpt: I had to give a quick lecture on using the command line and came up with this to do live demos of using the command line.
+excerpt: |
+  I made a set of interactive slides for a course on the command line, complete with command line playback!
+  <script async id="asciicast-498583" src="https://asciinema.org/a/498583.js" data-autoplay="true"></script>
 layout: post
-image: /assets/images/command_line_slides.png
-alt: A screenshot of a slide deck with computer code on it.
 ---
 
 I had to give a quick lecture on using the command line and came up with this to do live demos of using the command line. Embedded below.

_posts/2023-07-20-writing_grammars_is_fun.md

@@ -1,9 +1,22 @@
 ---
 title: Parsing is fun!
-excerpt: I came across something I wanted to quickly parse that was too niche to find a ready made parser for. Join me on a quick whip tour of writing a grammar for a PEG parser.
+excerpt: |
+    I came across something I wanted to quickly parse that was too niche to find a ready made parser for. Join me on a quick whip tour of writing a grammar for a PEG parser.
+    ```python
+    import pe
+
+    parser = pe.compile(
+        r'''
+        List    <- "[" String ("," Spacing String)* "]"
+        String  <- ~[a-zA-Z]+
+        Spacing <- [\t\n\f\r ]*
+        ''',
+    )
+    parser.match("[a, b, c]").groups()
+
+    >>> ('a', 'b', 'c')
+    ```
 layout: post
-image: /assets/blog/parsing/snippet.png
-alt: A purely illustrative screenshot of a snippet of python code with a little bit of a PEG grammar definition visible.
 commentid: 110746239432993930
 ---
 

_posts/2023-07-25-interactive-code-snippets.md

@@ -1,8 +1,8 @@
 ---
 title: A little REPL in every blog post
 layout: post
-image:
-alt: 
+image: /assets/blog/repl.png
+alt: A screenshot of a small javascript widget that lets you evaluate python code. It's showing some numpy code and its evaluated output.
 klipse: True
 ---