From e1b935938f176b1b93bcfa6a652413310d40b8d4 Mon Sep 17 00:00:00 2001
From: James McKinney <26463+jpmckinney@users.noreply.github.com>
Date: Mon, 12 Jul 2021 21:12:48 -0400
Subject: [PATCH] fix: Do not error if a directive has no options or body

---
 mdformat_myst/_directives.py | 2 ++
 tests/data/fixtures.md       | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/mdformat_myst/_directives.py b/mdformat_myst/_directives.py
index 9de256c..1a5545a 100644
--- a/mdformat_myst/_directives.py
+++ b/mdformat_myst/_directives.py
@@ -100,6 +100,8 @@ def format_directive_content(raw_content: str) -> str:
 
 
 def parse_opts_and_content(raw_content: str) -> tuple[str, str] | None:
+    if not raw_content:
+        return None
     lines = raw_content.splitlines()
     line = lines.pop(0)
     yaml_lines = []
diff --git a/tests/data/fixtures.md b/tests/data/fixtures.md
index 81819be..8801baf 100644
--- a/tests/data/fixtures.md
+++ b/tests/data/fixtures.md
@@ -394,3 +394,12 @@ letter: a
 ---
 ```
 .
+
+MyST directive, no opts or content
+.
+``` {some-directive} args
+```
+.
+```{some-directive} args
+```
+.