Use short token for code highlighting

Signed-off-by: Stephen Finucane <stephen@that.guru>
Closes: #5349

Author: stephenfin

docs/content/en/content-management/formats.md

@@ -217,7 +217,7 @@ Hugo passes reasonable default arguments to these external helpers by default:
 
 - `asciidoc`: `--no-header-footer --safe -`
 - `asciidoctor`: `--no-header-footer --safe --trace -`
-- `rst2html`: `--leave-comments --initial-header-level=2`
+- `rst2html`: `--leave-comments --initial-header-level=2 --syntax-highlight=short`
 - `pandoc`: `--mathjax`
 
 {{% warning "Performance of External Helpers" %}}

helpers/content.go

@@ -695,10 +695,10 @@ func getRstContent(ctx *RenderingContext) []byte {
 	// handle Windows manually because it doesn't do shebangs
 	if runtime.GOOS == "windows" {
 		python := getPythonExecPath()
-		args := []string{path, "--leave-comments", "--initial-header-level=2"}
+		args := []string{path, "--leave-comments", "--initial-header-level=2", "--syntax-highlight=short"}
 		result = externallyRenderContent(ctx, python, args)
 	} else {
-		args := []string{"--leave-comments", "--initial-header-level=2"}
+		args := []string{"--leave-comments", "--initial-header-level=2", "--syntax-highlight=short"}
 		result = externallyRenderContent(ctx, path, args)
 	}
 	// TODO(bep) check if rst2html has a body only option.