*: Reorganize code

testdata/codes.md

@@ -0,0 +1,67 @@
+`inline`
+
+```
+some code
+```
+```bash
+code bash
+```
+
+```bash
+with a newline
+
+```
+
+```unknown
+unknown code
+```
+text
+text 2
+```unknown
+unknown code 2
+```
+
+```sh title A b c
+no-collapse-title
+```
+
+```bash collapse title A b c
+collapse-and-title
+```
+
+```c collapse
+collapse-no-title
+```
+
+```nested
+code
+``` more code ```
+even more code
+```
+
+    indented code block
+    with multiple lines
+
+```mermaid
+graph TD;
+    A-->B;
+    A-->C;
+    B-->D;
+    C-->D;
+```
+
+```mermaid collapse title my mermaid graph
+graph TD;
+    A-->B;
+    A-->C;
+    B-->D;
+    C-->D;
+```
+
+```mermaid title my mermaid graph
+graph TD;
+    A-->B;
+    A-->C;
+    B-->D;
+    C-->D;
+```