Name the position a directive name the other one spells belongs to

src/markdown/text-directive.ts

@@ -2,14 +2,17 @@ import type { ConvertFault } from '../result.ts'
 import type { DirectiveSpan, Read } from './directive-syntax.ts'
 import { spellAttributes, spellLeafDirective, spellStringAttribute } from './directive-syntax.ts'
 
-const name = 'text'
+export const textDirectiveName = 'text'
+
 const whitespaceRun = /^(?:[ \t]+|\n+)$/
 
 export function spellTextDirective(text: string): string {
+  const name = textDirectiveName
   return spellLeafDirective(name, spellAttributes([[name, spellStringAttribute(text)]]))
 }
 
 export function readTextDirective(span: DirectiveSpan): Read<string> | undefined {
+  const name = textDirectiveName
   if (span.name !== name) return undefined
   if (span.content !== undefined) return { fault: unsupported(`${name} takes no content`) }
   const spelled = span.attributes.get(name)