How to remove trigger character on autocomplete in tinyMCE?

Here is an example of using the autocompleter and not including the trigger character:

https://fiddle.tiny.cloud/u7haab/12

The fetch function determines what is returned:

fetch: function (pattern) {
        return new tinymce.util.Promise(function (resolve) {
          var results = getMatchedNames(pattern).map(function (char) {
            return {
              type: 'autocompleteitem',
              value: char.value,     //This VALUE is what is inserted into the content via the onAction method
              text: char.value,
            }
          });
          resolve(results);
        });
}

...and the onAction method takes the value and inserts it into the editor:

var onAction = function (autocompleteApi, rng, value) { 
      editor.selection.setRng(rng);
      editor.insertContent(value);
      autocompleteApi.hide();
    };

Unless you explicitly choose to include the trigger character it won't be included if you follow this pattern.