changing doc format and HTML literals

site/doc/pages/cwd_get.txt

@@ -4,12 +4,13 @@ String cwd_get()
 :params
 return value : the current working directory
 
-:desc
-Returns the current working directory.
-
 :see
 >sys
 
-:related
-**PHP:** `getcwd()`
-**JavaScript / Node.js:** Node `process.cwd()`
+:content
+Returns the current working directory.
+
+## Related Concepts
+
+- PHP: `getcwd()`
+- JavaScript / Node.js: Node `process.cwd()`