That would be to do with customising the CSS, which isn't something I'm very knowledgeable about, least of all xenForo's CSS, sorry

No what I mean is, the reason why those lines appear is because of XenForo's CSS rules.

If you install and use the extension Firebug, or use the developer tools in Chrome or IE, you'll see what I mean

Changing the date format in xFShout is not supported at this time, sorry

I don't remember where the date format was defined in the code, no.

Here is the code:

Code:

<?php
/*======================================================================*\
|| #################################################################### ||
|| # ---------------------------------------------------------------- # ||
|| # Copyright ©2007-2009 Fillip Hannisdal AKA Revan/NeoRevan/Belazor # ||
|| # All Rights Reserved. 											  # ||
|| # This file may not be redistributed in whole or significant part. # ||
|| # ---------------------------------------------------------------- # ||
|| # You are not allowed to use this on your server unless the files  # ||
|| # you downloaded were done so with permission.					  # ||
|| # ---------------------------------------------------------------- # ||
|| #################################################################### ||
\*======================================================================*/

class DBTech_xFShout_ControllerPublic_Shout extends XenForo_ControllerPublic_Abstract
{
	/** 
	 * View top x stats
	 * @return XenForo_ControllerResponse_View
	 */
	public function actionIndex()
	{    			
		$input = $this->_input->filter(array(
			'instanceid' 	=> XenForo_Input::UINT,
			'chatroomid' 	=> XenForo_Input::UINT,
		));
		
    	// Create some needed arrays
    	$instances 		= $this->_getCacheModel()->get('dbtech_xfshout_instance');
    	$permissions 	= $this->_getCacheModel()->get('dbtech_xfshout_instperms');
    	$visitor 		= XenForo_Visitor::getInstance()->toArray();

    	// Assert whether we are banned
       	$this->_assertBanned($visitor);
		
		// Assert instance id
		$this->_assertInstanceId($input['instanceid']);        	
    	
		// Get effective permissions
		$this->_getShoutModel()->getEffectivePermissions($visitor, $permissions);
		
		// Grab effective permissions
		$effectivePermissions = $visitor['permissions']['dbtech_xfshout'][$input['instanceid']];

		// Assert if we can post shouts
		$this->_assertPermissions($effectivePermissions, 'canview');
		
		// Ensure this is set
		$instance = $instances[$input['instanceid']];
		$instance['options'] = @unserialize($instance['options']);		
		
		// Get all shouts
		$shouts = $this->_getShoutModel()->getShouts($input['instanceid'], $input['chatroomid'], $instance['options']['numshouts']);
		
		foreach ($shouts as &$shout)
		{
			// Parse the dateline properly -.-
			$shout['dateline_parsed'] = XenForo_Locale::dateTime($shout['dateline'], 'relative');
			
			if (preg_match("#^(\/[a-z]*?)\s(.+?)$#i", $shout['message_parsed'], $matches))
			{
				// 2-stage command
				switch ($matches[1])
				{
					case '/me':
						// A slash me
						$shout['message_parsed'] 	= trim($matches[2]);
						$shout['type'] 				= $this->_getShoutModel()->getShoutType('me');
						break;
						
					default:
						//($hook = vBulletinHook::fetch_hook('dbtech_vbshout_parsecommand_2')) ? eval($hook) : false;
						break;				
				}
			}
		}

		//XenForo_Application::get('options')->dbtech_xfshout_limit
		$viewParams = array(
			'shouts'		=> $shouts,
			'sticky'		=> $instance['sticky'],
			'stickyParsed'	=> $instance['sticky_parsed'],
			'instanceid'	=> $input['instanceid'],
			'permissions'	=> $effectivePermissions,
			'visitor'		=> $visitor
		);
		
		return $this->responseView('DBTech_xFShout_ViewPublic_Shout', 'dbtech_xfshout_shouts', $viewParams);
	}
	
	/**
	 * Submits a new shout or returns current shouts
	 * @return XenForo_ControllerResponse_View
	 */
	public function actionAdd()
	{
		$input = $this->_input->filter(array(
			'shout' 		=> XenForo_Input::STRING,
			'shoutid' 		=> XenForo_Input::UINT,
			'instanceid' 	=> XenForo_Input::UINT,
			'chatroomid' 	=> XenForo_Input::UINT,
			'onlyadd'		=> XenForo_Input::UINT,
		));
		
		if (!empty($input['shout']))
		{
			// Actually adding a shout can only come from POST
			$this->_assertPostOnly();
			
	    	// Create some needed arrays
	    	$instances 		= $this->_getCacheModel()->get('dbtech_xfshout_instance');
	    	$permissions 	= $this->_getCacheModel()->get('dbtech_xfshout_instperms');
	    	$visitor 		= XenForo_Visitor::getInstance()->toArray();

	    	// Assert whether we are banned
	       	$this->_assertBanned($visitor);
			
			// Assert instance id
			$this->_assertInstanceId($input['instanceid']);	       	
	    	
			// Get effective permissions
			$this->_getShoutModel()->getEffectivePermissions($visitor, $permissions);
			
			// Grab effective permissions
			$effectivePermissions = $visitor['permissions']['dbtech_xfshout'][$input['instanceid']];		
			
			// Pass the string through various helpers
			$input['shout'] = XenForo_Helper_String::censorString($input['shout']);
			
			// Create the new BBCode Formatter object
			$formatter = XenForo_BbCode_Formatter_Base::create('DBTech_xFShout_BbCode_Shout');
			
			$instance = $instances[$input['instanceid']];
			$instance['options'] = @unserialize($instance['options']);
			$instance['bbcode'] = @unserialize($instance['bbcode']);
			
			$bbcode = array();
			foreach ($instance['bbcode'] as $bbcodeid => $onoff)
			{
				if (!$onoff)
				{
					// Disabled BBCode
					continue;
				}
				
				// Add this to allowed tags
				$bbcode[] = $bbcodeid;
			}
			
			// Override the list of BBCode Tags allowed based on per-instance options
			$formatter->setTags($bbcode);
			
			// Create the BBCode Parser
			$parser = new XenForo_BbCode_Parser($formatter);
			
			// Construct a dummy array to keep the wrapper happy
			$messages = array(0 => array('message' => $input['shout']));
			
			// Do BBCode conversion
			$messages[0]['message'] = XenForo_Helper_String::autoLinkBbCode($messages[0]['message']);
			XenForo_ViewPublic_Helper_Message::bbCodeWrapMessages($messages, $parser);			
			
			// Init the datawriter
			$dw = XenForo_DataWriter::create('DBTech_xFShout_DataWriter_Shout');			
				$dw->setOption('effectivePermissions', $effectivePermissions);
				$dw->setErrorHandler(XenForo_DataWriter::ERROR_ARRAY);
							
			if (!$input['shoutid'])
			{
				// Assert if we can post shouts
				$this->_assertPermissions($effectivePermissions, 'canshout');
				
				// Set some new-only values
				$dw->set('userid', XenForo_Visitor::getUserId());
				$dw->set('instanceid', $input['instanceid']);
				$dw->set('chatroomid', $input['chatroomid']);
			}
			else
			{
				// We're potentially editing a shout
				$dw->setExistingData($input['shoutid']);
				
				if ($dw->get('userid') == $visitor['user_id'])
				{
					// Assert if we can edit own shouts
					$this->_assertPermissions($effectivePermissions, 'caneditown');
				}
				else
				{
					// Assert if we can post shouts
					$this->_assertPermissions($effectivePermissions, 'caneditothers');
				}
			}
			
			// Set the rest of the (always changed) data
				$dw->set('message', strip_tags($input['shout']));
				$dw->set('message_parsed', strip_tags($messages[0]['messageHtml']->__toString()));
			$shoutid = $dw->save();
			
			if (!$shoutid)
			{
				// Fling me sum error
				throw $this->responseException(
					$this->responseError(implode('<br />', $dw->getErrors()), 500)
				);				
			}
		}
		
		return ($input['onlyadd'] ? true : $this->actionIndex());
	}
	
	/**
	 * Deletes a shout.
	 * @return XenForo_ControllerResponse_View
	 */
	public function actionDelete()
	{
		$input = $this->_input->filter(array(
			'shoutid' 		=> XenForo_Input::UINT,
			'instanceid' 	=> XenForo_Input::UINT,
			'chatroomid' 	=> XenForo_Input::UINT,
			'onlydelete'	=> XenForo_Input::UINT,
		));
		
		// Actually adding a shout can only come from POST
		$this->_assertPostOnly();
		
    	// Create some needed arrays
    	$instances 		= $this->_getCacheModel()->get('dbtech_xfshout_instance');
    	$permissions 	= $this->_getCacheModel()->get('dbtech_xfshout_instperms');
    	$visitor 		= XenForo_Visitor::getInstance()->toArray();

    	// Assert whether we are banned
       	$this->_assertBanned($visitor);
		
		// Assert instance id
		$this->_assertInstanceId($input['instanceid']);	       	
    	
		// Get effective permissions
		$this->_getShoutModel()->getEffectivePermissions($visitor, $permissions);
		
		// Grab effective permissions
		$effectivePermissions = $visitor['permissions']['dbtech_xfshout'][$input['instanceid']];
		
		// Init the datawriter
		$dw = XenForo_DataWriter::create('DBTech_xFShout_DataWriter_Shout');			
			$dw->setOption('effectivePermissions', $effectivePermissions);
			$dw->setErrorHandler(XenForo_DataWriter::ERROR_ARRAY);
			$dw->setExistingData($input['shoutid']);
			
			if ($dw->get('userid') == $visitor['user_id'])
			{
				// Assert if we can edit own shouts
				$this->_assertPermissions($effectivePermissions, 'caneditown');
			}
			else
			{
				// Assert if we can post shouts
				$this->_assertPermissions($effectivePermissions, 'caneditothers');
			}
		$dw->delete();
		
		return ($input['onlydelete'] ? true : $this->actionIndex());
	}	
	
	/**
	 * Helper to assert that this action is available with a valid instance id. 
	 * Throws an exception if the request doesn't carry an instance id or it's invalid
	 * 
	 * @param integer The instance ID to check.
	 */
	protected function _assertInstanceId($instance_id)
	{
		$instances = $this->_getCacheModel()->get('dbtech_xfshout_instance');
		if (!isset($instances[$instance_id]))
		{
			throw $this->responseException(
				$this->responseError(new XenForo_Phrase('dbtech_xfshout_invalid_instanceid'), 500)
			);
		}
	}
	
	/**
	 * Helper to assert that this action is unavailable if banned. 
	 * Throws an exception if the user is banned
	 * 
	 * @param integer The visitor to check.
	 */
	protected function _assertBanned($visitor)
	{
		if ($visitor['dbtech_xfshout_banned'])
		{
			throw $this->responseException(
				$this->responseError(new XenForo_Phrase('dbtech_xfshout_banned'), 500)
			);
		}
	}

	/**
	 * Helper to assert that this action is available with a valid permission. 
	 * Throws an exception if the visitor doesn't have the required permissions.
	 * 
	 * @param array The visitor's permissions
	 * @param string The type of action we're doing
	 */
	protected function _assertPermissions($permissions, $type)
	{
		if (!$permissions[$type])
		{
			throw $this->responseException(
				$this->responseError(new XenForo_Phrase('dbtech_xfshout_no_permissions_' . $type), 500)
			);
		}
	}	

	/**
	 * Grabs the xFShout model from the cache.
	 * 
	 * @return DBTech_xFShout_Model_Shout
	 */
	protected function _getShoutModel()
	{
		return $this->getModelFromCache('DBTech_xFShout_Model_Shout');
	}
	/**
	 * Grabs the Cache model from the cache.
	 * 
	 * @return XenForo_Model_DataRegistry
	 */
	protected function _getCacheModel()
	{
		return $this->getModelFromCache('XenForo_Model_DataRegistry');
	}
}

PHP Code:

$shout['dateline_parsed'] = XenForo_Locale::dateTime($shout['dateline'], 'relative'); 


is the line.