_content/css: style tables produced from markdown

We emit a <div class=markdown> around the whole output of goldmark,
so that CSS style rules can easily select them (without affecting
HTML tables in the spec, for example).

The default style for markdown tables now has thin grey lines,
grey headings, and a little padding.

Also, remove the FS middleware used to inject default.tmpl
into x/tools/gopls/doc, since that file is now actually present.
And add it to the fake data at _content/gopls/doc.

Fixes golang/go#67368

Change-Id: If91e702c394d73a181bd780711e8be6f661f2e59
Reviewed-on: https://go-review.googlesource.com/c/website/+/691616
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Alan Donovan <adonovan@google.com>

1 files changed, 1 insertions, 28 deletions

diff --git a/cmd/golangorg/server.go b/cmd/golangorg/server.go
index 71218c05..17d55a3f 100644
--- a/cmd/golangorg/server.go
+++ b/cmd/golangorg/server.go
@@ -28,7 +28,6 @@ import (
 	"strings"
 	"sync"
 	"sync/atomic"
-	"testing/fstest"
 	"time"
 
 	"cloud.google.com/go/datastore"
@@ -320,26 +319,7 @@ func addGopls(contentFS fs.FS, ref string) fs.FS {
 		go watchGit(&toolsFS, "https://go.googlesource.com/tools", ref)
 	}
 
-	// Inject gopls/doc/default.tmpl into the FS, since
-	// unlike wiki, x/tools/gopls/doc doesn't have the
-	// default.tmpl needed by the markdown renderer.
-	// TODO(adonovan): remove once CL 686595 has been released in gopls/v0.20.0.
-	overlay := fstest.MapFS{
-		"gopls/doc/default.tmpl": {
-			Data: []byte(`
-{{define "layout"}}
-{{doclayout .}}
-{{end}})}`[1:]),
-		},
-	}
-	tools2FS := fnFS(func(name string) (fs.File, error) {
-		if _, ok := overlay[name]; ok {
-			return overlay.Open(name)
-		}
-		return toolsFS.Open(name) // delegate
-	})
-
-	goplsDocFS, err := fs.Sub(tools2FS, "gopls/doc")
+	goplsDocFS, err := fs.Sub(&toolsFS, "gopls/doc")
 	if err != nil {
 		log.Fatalf("can't restrict to gopls/doc tree: %v", err)
 	}
@@ -1031,10 +1011,3 @@ func jsonUnmarshal(data []byte) (any, error) {
 	err := json.Unmarshal(data, &x)
 	return x, err
 }
-
-// A fnFS is a closure that defines an [fs.FS].
-type fnFS func(name string) (fs.File, error)
-
-var _ fs.FS = fnFS(nil)
-
-func (f fnFS) Open(name string) (fs.File, error) { return f(name) }