Properly render author names using markdown template

fixes #6068

news/changelog-1.4.md

@@ -221,7 +221,8 @@
 - Improved support for affiliation metadata, including `ringgold`, `isni`, `ror`
 - Add support for `funding`, including support for simple strings or funding including `source`, `recipient`, and `investigator`. `source` and `recipient` may
   -be one or more simple strings, `ref`s to an author or affiliation id, or an object following the `institution` schema.
-- ([#5764](https://github.com/quarto-dev/quarto-cli/issues/6138)): Add support for affiliations to include a `group` property to represent the team or research group within the affiliation
+- ([#5764](https://github.com/quarto-dev/quarto-cli/issues/5764)): Add support for affiliations to include a `group` property to represent the team or research group within the affiliation
+- ([#6068](https://github.com/quarto-dev/quarto-cli/issues/6068)): Properly display author names in default commonmark and gfm output
 - ([#6138](https://github.com/quarto-dev/quarto-cli/issues/6138)): Add support for `degrees` to specify academic titles or professional certifications displayed following a personal name (for example, "MD", "PhD").
 - ([#6139](https://github.com/quarto-dev/quarto-cli/issues/6139)): For markdown output that will not include yaml front matter, still perform author normalization. When `yaml_metadata_block` is enabled (or for pandoc markdown) do not normalize author front matter since that will result in extraneous author keys.
 

src/resources/pandoc/templates/default.markdown

@@ -1,9 +1,7 @@
 $if(title)$
 # $title$
 $endif$
-$if(author)$
-$author$
-$endif$
+$for(by-author)$$it.name.literal$$sep$, $endfor$
 $if(date)$
 $date$
 $endif$