Update comments

Author: kgryte

lib/node_modules/@stdlib/fs/read-file/README.md

@@ -88,7 +88,7 @@ The function accepts the same options as [`fs.readFileSync()`][fs].
 ```javascript
 var readFile = require( '@stdlib/fs/read-file' );
 
-// Sync //
+/* Sync */
 
 var file = readFile.sync( __filename, 'utf8' );
 // returns <string>
@@ -105,7 +105,7 @@ console.log( file instanceof Error );
 // => true
 
 
-// Async //
+/* Async */
 
 readFile( __filename, onFile );
 readFile( 'beepboop', onFile );

lib/node_modules/@stdlib/fs/read-file/examples/index.js

@@ -2,7 +2,7 @@
 
 var readFile = require( './../lib' );
 
-// Sync //
+/* Sync */
 
 var file = readFile.sync( __filename, 'utf8' );
 // returns <string>
@@ -19,7 +19,7 @@ console.log( file instanceof Error );
 // => true
 
 
-// Async //
+/* Async */
 
 readFile( __filename, onFile );
 readFile( 'beepboop', onFile );