Lua: re-add content property to Link elements

This was a regression introduced in version 2.15.

Fixes: #7647

src/Text/Pandoc/Lua/Marshaling/AST.hs

@@ -608,6 +608,7 @@ setInlineContent = \case
   -- inline content
   Cite cs _     -> Actual . Cite cs . inlineContent
   Emph _        -> Actual . Emph . inlineContent
+  Link a _ tgt  -> Actual . (\inlns -> Link a inlns tgt) . inlineContent
   Quoted qt _   -> Actual . Quoted qt . inlineContent
   SmallCaps _   -> Actual . SmallCaps . inlineContent
   Span attr _   -> Actual . Span attr . inlineContent
@@ -633,6 +634,7 @@ getInlineContent :: Inline -> Possible Content
 getInlineContent = \case
   Cite _ inlns      -> Actual $ ContentInlines inlns
   Emph inlns        -> Actual $ ContentInlines inlns
+  Link _ inlns _    -> Actual $ ContentInlines inlns
   Quoted _ inlns    -> Actual $ ContentInlines inlns
   SmallCaps inlns   -> Actual $ ContentInlines inlns
   Span _ inlns      -> Actual $ ContentInlines inlns

test/lua/module/pandoc.lua

@@ -148,6 +148,16 @@ return {
       end)
     }
   },
+  group "Inline elements" {
+    test('Link has property `content`', function ()
+      local link = pandoc.Link('example', 'https://example.org')
+      assert.are_same(link.content, {pandoc.Str 'example'})
+
+      link.content = 'commercial'
+      link.target = 'https://example.com'
+      assert.are_equal(link, pandoc.Link('commercial', 'https://example.com'))
+    end)
+  },
   group "Block elements" {
     group "BulletList" {
       test('access items via property `content`', function ()