Improve attribute name handling

Added:
- Condition to trim leading and trailing whitespace from the array key.
- Condition to ignore any empty array key.

Author: mcaskill

Function.HTML-Build-Attributes.php

@@ -21,6 +21,14 @@ function html_build_attributes(array $attr, callable $callback = null)
                 continue;
             }
 
+            if (is_string($key)) {
+                $key = trim($key);
+
+                if (strlen($key) === 0) {
+                    continue;
+                }
+            }
+
             if (is_object($val)) {
                 if ($val instanceof Closure) {
                     $val = $val();