Use string interpolation instead of string concatenation in order to improve readability

Author: mardukbp

django_select2/static/django_select2/django_select2.js

@@ -27,14 +27,14 @@
           let dependentFields = $element.data('select2-dependent-fields')
           if (dependentFields) {
             const findElement = function (selector) {
-              const result = $(selector, $element.closest(':has(' + selector + ')'))
+              const result = $(selector, $element.closest(`:has(${selector})`))
               if (result.length > 0) return result
               else return null
             }
             dependentFields = dependentFields.trim().split(/\s+/)
             $.each(dependentFields, function (i, dependentField) {
-              const nameIs = '[name=' + dependentField + ']'
-              const nameEndsWith = '[name$=' + dependentField + ']'
+              const nameIs = `[name=${dependentField}]`
+              const nameEndsWith = `[name$=${dependentField}]`
               result[dependentField] = (findElement(nameIs) || findElement(nameEndsWith)).val()
             })
           }