Move the euro symbol before the price

euro_symbol.php

/**
 * Implements hook_commerce_currency_info_alter().
 * Euro symbol beefore price
 */
function the_aim_custom_commerce_currency_info_alter(&$currencies, $langcode) {
  $currencies['EUR']['symbol'] = '€ ';
  $currencies['EUR']['symbol_placement'] = 'before';
  $currencies['EUR']['code_placement'] = '';
}