Force colon fences for all directives

Author: brunobeltran

mdformat_myst/_directives.py

@@ -50,7 +50,7 @@ def fence(node: "RenderTreeNode", context: "RenderContext") -> str:
     is_directive = lang.startswith("{") and lang.endswith("}")
     unformatted_body = node.content
 
-    if node.type == "colon_fence":
+    if node.type == "colon_fence" or is_directive:
         fence_char = ":"
     # Info strings of backtick code fences can not contain backticks or tildes.
     # If that is the case, we make a tilde code fence instead.

tests/data/fixtures.md

@@ -434,37 +434,37 @@ Content
 Content
 ```
 .
-```{some-directive} args
+:::{some-directive} args
 ---
 option1: 1
 option2: hello
 ---
 Content
-```
+:::
 
-```{some-directive} args
+:::{some-directive} args
 ---
 option1: 1
 option2: hello
 ---
 Content
-```
+:::
 
-```{some-directive} args
+:::{some-directive} args
 ---
 option1: 1
 option2: hello
 ---
 Content
-```
+:::
 
-```{some-directive} args
+:::{some-directive} args
 ---
 option1: 1
 option2: hello
 ---
 Content
-```
+:::
 .
 
 
@@ -475,11 +475,11 @@ MyST directive empty YAML
 Content
 ```
 .
-```{some-directive} args
+:::{some-directive} args
 ---
 ---
 Content
-```
+:::
 .
 
 MyST directive no content
@@ -489,20 +489,20 @@ MyST directive no content
 
 ```
 .
-```{some-directive} args
+:::{some-directive} args
 ---
 letter: a
 ---
-```
+:::
 .
 
 MyST directive, no opts or content
 .
 ``` {some-directive} args
 ```
 .
-```{some-directive} args
-```
+:::{some-directive} args
+:::
 .
 MyST colon fenced directive with title
 .