[ticket/12458] Apply Squiz.WhiteSpace.SuperfluousWhitespace.* to legacy code.

* There MUST NOT be trailing whitespace at the end of lines.
* There MUST NOT be whitespace before the first content of a file.
* There MUST NOT be whitespace after the last content of a file.
* Functions MUST NOT contain multiple empty lines in a row.

PHPBB3-12458

phpBB/install/convertors/functions_phpbb20.php

@@ -71,7 +71,6 @@ function phpbb_insert_forums()
 	$prune_enabled = (int) $src_db->sql_fetchfield('config_value');
 	$src_db->sql_freeresult($result);
 
-
 	// Insert categories
 	$sql = 'SELECT cat_id, cat_title
 		FROM ' . $convert->src_table_prefix . 'categories
@@ -571,7 +570,6 @@ function phpbb_convert_authentication($mode)
 		// What we will do is handling all 2.0.x admins as founder to replicate what is common in 2.0.x.
 		// After conversion the main admin need to make sure he is removing permissions and the founder status if wanted.
 
-
 		// Grab user ids of users with user_level of ADMIN
 		$sql = "SELECT user_id
 			FROM {$convert->src_table_prefix}users

phpBB/install/install_install.php

@@ -217,7 +217,6 @@ class install_install extends module
 			'S_LEGEND'		=> false,
 		));
 
-
 		// Check for getimagesize
 		if (@function_exists('getimagesize'))
 		{
@@ -535,7 +534,6 @@ class install_install extends module
 		$url = (!in_array(false, $passed)) ? $this->p_master->module_url . "?mode=$mode&sub=database&language=$language" : $this->p_master->module_url . "?mode=$mode&sub=requirements&language=$language	";
 		$submit = (!in_array(false, $passed)) ? $lang['INSTALL_START'] : $lang['INSTALL_TEST'];
 
-
 		$template->assign_vars(array(
 			'L_SUBMIT'	=> $submit,
 			'S_HIDDEN'	=> $s_hidden_fields,