Been adding products & customising over time, not yet promoted this section of site heavily, but...

I have addded a number of products for sale, yet just made my first product (or attempted to) to show it but without price/stock, intended as a display only, as its sold via another product & in with a special.

After doing this the error came up in my test!
Parse error:syntax error, unexpected T_STRING in
includes/languages/custom/english/shopping_cart.php on line 17

Have not recently changed that file & cannot work out what variable is causing this new problem.
If its related to 'display product' with no price or quantity set, then how can I still show some products without them being available to buy & incur the cart problem?

Cannot find any specific thread on this topic.
Shop on version 1.3.7 otherwise working great, waiting for 1.3.8 to settle down before a possible upgrade.