planning

node_modules/mdast-util-to-markdown/lib/util/check-strong.js

@@ -0,0 +1,15 @@
+module.exports = checkStrong
+
+function checkStrong(context) {
+  var marker = context.options.strong || '*'
+
+  if (marker !== '*' && marker !== '_') {
+    throw new Error(
+      'Cannot serialize strong with `' +
+        marker +
+        '` for `options.strong`, expected `*`, or `_`'
+    )
+  }
+
+  return marker
+}