net.http.file: fix usage examples (add closing apostrophes)

vlib/net/http/file/static_server.v

@@ -24,10 +24,10 @@ pub mut:
 // The most common usage is the following: `v -e 'import net.http.file; file.serve()'`
 // will listen for http requests on port 4001 by default, and serve all the files in the current folder.
 //
-// Another example: `v -e 'import net.http.file; file.serve(folder: "/tmp")`
+// Another example: `v -e 'import net.http.file; file.serve(folder: "/tmp")'`
 // will serve all files inside the /tmp folder.
 //
-// Another example: `v -e 'import net.http.file; file.serve(folder: "~/Projects", on: ":5002")`
+// Another example: `v -e 'import net.http.file; file.serve(folder: "~/Projects", on: ":5002")'`
 // will expose all the files inside the ~/Projects folder, on http://localhost:5002/ .
 pub fn serve(params StaticServeParams) {
 	mut nparams := params