[Theming Snippets] Change number of products displayed per page

wc-products-displayed-per-page.php

/**
 * Change number of products that are displayed per page (shop page)
 */
add_filter( 'loop_shop_per_page', 'new_loop_shop_per_page', 20 );

function new_loop_shop_per_page( $cols ) {
  // $cols contains the current number of products per page based on the value stored on Options -> Reading
  // Return the number of products you wanna show per page.
  $cols = 9;
  return $cols;
}

The description of this snippet in the original woocommerce docs is simply WRONG.
$cols DOES NOT decide the number of products, it decides the NUMBER OF COLUMNS in which the products are displayed.
Why do you think it's called $COLS, not $nproducts or similar ? Because it's about the NUMBER OF COLUMNS !
So this here:
https://woocommerce.com/document/change-number-of-products-displayed-per-page/
should be changed to read something like:
/**

• Change number of COLUMNS for displaying the products (shop page)
  */
  add_filter( 'loop_shop_per_page', 'new_loop_shop_per_page', 20 );

function new_loop_shop_per_page( $cols ) {
// $cols contains the current number of COLUMNS in which the number of products based on the value stored on Options –> Reading is displayed , so let's say you have 9 posts in Reading settings, and 3 as $cols here, that will display 9 products in 3 rows of 3 products each !
// Return the number of COLUMNS PER ROW you wanna show ON THE SHOP PAGE
$cols = 3;
return $cols;