Shortcodes: = is a reserved character in shortcode names, mark it as such.

This allows for shortcodes such as `[shortcode=attribute]` to work, which while never intentionally supported were widely used in the pre-shortcode days.

Props aaroncampbell.
Fixes #34939 for trunk.


git-svn-id: https://develop.svn.wordpress.org/trunk@36097 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/shortcode.php

@@ -647,4 +647,14 @@ EOF;
 
 	}
 
+	/**
+	 * @ticket 34939
+	 *
+	 * Test the (not recommended) [shortcode=XXX] format
+	 */
+	function test_unnamed_attribute() {
+		$out = do_shortcode('[dumptag=https://wordpress.org/]');
+		$expected = "0 = =https://wordpress.org\n";
+		$this->assertEquals($expected, $out);
+	}
 }