Docs for deno test + minor other changes (#5185)

* Added fs events example.
* Added docs for `deno test`.
* Renamed file server example.
* Unified markdown code types.
* Removed plugin topics from TOC.
* Fixed links.

4 files changed, 21 insertions, 3 deletions

diff --git a/docs/examples/fileserver.md b/docs/examples/file_server.md
index 3ed9d90e7..9fbe27bd3 100644
--- a/docs/examples/fileserver.md
+++ b/docs/examples/file_server.md
@@ -2,7 +2,7 @@
 
 This one serves a local directory in HTTP.
 
-```bash
+```shell
 deno install --allow-net --allow-read https://deno.land/std/http/file_server.ts
 ```
 
diff --git a/docs/examples/file_system_events.md b/docs/examples/file_system_events.md
new file mode 100644
index 000000000..2abebc33e
--- /dev/null
+++ b/docs/examples/file_system_events.md
@@ -0,0 +1,18 @@
+### File system events
+
+To poll for file system events:
+
+```ts
+const watcher = Deno.watchFs("/");
+for await (const event of watcher) {
+  console.log(">>>> event", event);
+  // { kind: "create", paths: [ "/foo.txt" ] }
+}
+```
+
+Note that the exact ordering of the events can vary between operating systems.
+This feature uses different syscalls depending on the platform:
+
+- Linux: inotify
+- macOS: FSEvents
+- Windows: ReadDirectoryChangesW
diff --git a/docs/examples/tcp_echo.md b/docs/examples/tcp_echo.md
index d7c2e9e72..360c5facc 100644
--- a/docs/examples/tcp_echo.md
+++ b/docs/examples/tcp_echo.md
@@ -25,7 +25,7 @@ For security reasons, Deno does not allow programs to access the network without
 explicit permission. To allow accessing the network, use a command-line flag:
 
 ```shell
-$ deno run --allow-net https://deno.land/std/examples/echo_server.ts
+deno run --allow-net https://deno.land/std/examples/echo_server.ts
 ```
 
 To test it, try sending data to it with netcat:
diff --git a/docs/examples/unix_cat.md b/docs/examples/unix_cat.md
index 7534ef0d0..ca85ea325 100644
--- a/docs/examples/unix_cat.md
+++ b/docs/examples/unix_cat.md
@@ -20,5 +20,5 @@ I/O streams in Deno.
 Try the program:
 
 ```shell
-$ deno run --allow-read https://deno.land/std/examples/cat.ts /etc/passwd
+deno run --allow-read https://deno.land/std/examples/cat.ts /etc/passwd
 ```