changing doc format and HTML literals

site/doc/pages/file_put_contents.txt

@@ -6,12 +6,13 @@ file_name : file name of file that should be written
 content : content that should be written
 return value : true if write was successful
 
-:desc
-Writes the String 'content' into a file identified by 'file_name'. Any pre-existing content of the file will be overwritten.
-
 :see
 >sys
 
-:related
-**PHP:** `file_put_contents()`
-**JavaScript / Node.js:** Node `fs.writeFileSync()` or `fs.promises.writeFile()`
+:content
+Writes `content` into the file identified by `file_name`, overwriting any pre-existing content.
+
+## Related Concepts
+
+- PHP: `file_put_contents()`
+- JavaScript / Node.js: Node `fs.writeFileSync()` or `fs.promises.writeFile()`