wordpress - Why are Woocommerce product names showing the word line [line] in square brackets after? -

as title suggests, can please advise why woocommerce showing word line in square brackets '[line]' after product names?

please see image below:

i using latest version of wordpress (3.8.1), yith socute theme , woocommerce following plugins:

• wow slider
• woocommerce compare
• woocommerce ajax navigation
• woocommerce wish list
• woocommerce magnifier

i think there may simple explanation missing; however, can't find answers using google and, have spent far time looking (a full day).

so, it's time ask help.

thanks everyone.

the [line] been added page piece of code:

add_action( 'woocommerce_single_product_summary', create_function( '', 'echo do_shortcode("[line]");' ) ); 

in woocommerce/content-single-product.php file

to remove [line] 1 of 2 things:

1. change piece of code to

   add_action( 'woocommerce_single_product_summary', create_function( '', 'echo do_shortcode(" ");' ) ); 

2. remove/comment out line, in doing need add clear:left; .single-product.woocommerce div.product .description style:

   .single-product.woocommerce div.product .description {     margin-top: 20px;     margin-bottom: 20px;     clear: left; } 

   otherwise description come onto same line product title.