ContentHelperError: Avoid double prefix in error messages

build/content-helper/dashboard-widget.asset.php

@@ -1 +1 @@
-<?php return array('dependencies' => array('react', 'wp-api-fetch', 'wp-components', 'wp-data', 'wp-element', 'wp-i18n', 'wp-url'), 'version' => '2a085e2f1803cbb45764');
+<?php return array('dependencies' => array('react', 'wp-api-fetch', 'wp-components', 'wp-data', 'wp-element', 'wp-i18n', 'wp-url'), 'version' => '95153dbec309e62a3333');

build/content-helper/editor-sidebar.asset.php

@@ -1 +1 @@
-<?php return array('dependencies' => array('react', 'wp-api-fetch', 'wp-block-editor', 'wp-blocks', 'wp-components', 'wp-compose', 'wp-core-data', 'wp-data', 'wp-dom-ready', 'wp-edit-post', 'wp-editor', 'wp-element', 'wp-hooks', 'wp-i18n', 'wp-plugins', 'wp-primitives', 'wp-url'), 'version' => 'ac7a09f073a20dbbcbf8');
+<?php return array('dependencies' => array('react', 'wp-api-fetch', 'wp-block-editor', 'wp-blocks', 'wp-components', 'wp-compose', 'wp-core-data', 'wp-data', 'wp-dom-ready', 'wp-edit-post', 'wp-editor', 'wp-element', 'wp-hooks', 'wp-i18n', 'wp-plugins', 'wp-primitives', 'wp-url'), 'version' => '9f2a886c3b98c8ef0fb4');

build/content-helper/excerpt-generator.asset.php

@@ -1 +1 @@
-<?php return array('dependencies' => array('react', 'wp-api-fetch', 'wp-components', 'wp-data', 'wp-edit-post', 'wp-editor', 'wp-element', 'wp-hooks', 'wp-i18n', 'wp-plugins', 'wp-primitives', 'wp-url', 'wp-wordcount'), 'version' => '1c19550f70ae7ceace8b');
+<?php return array('dependencies' => array('react', 'wp-api-fetch', 'wp-components', 'wp-data', 'wp-edit-post', 'wp-editor', 'wp-element', 'wp-hooks', 'wp-i18n', 'wp-plugins', 'wp-primitives', 'wp-url', 'wp-wordcount'), 'version' => 'f2a7e7c401d2876ef9ba');

src/content-helper/common/content-helper-error.tsx

@@ -52,8 +52,18 @@ export class ContentHelperError extends Error {
 	protected hint: string | null = null;
 	public retryFetch: boolean;
 
-	constructor( message: string, code: ContentHelperErrorCode, prefix = __( 'Error: ', 'wp-parsely' ) ) {
-		super( prefix + message );
+	constructor(
+		message: string,
+		code: ContentHelperErrorCode,
+		messagePrefix = __( 'Error: ', 'wp-parsely' )
+	) {
+		// Avoid double message prefix.
+		if ( message.startsWith( messagePrefix ) ) {
+			messagePrefix = '';
+		}
+
+		// Initialization.
+		super( messagePrefix + message );
 		this.name = this.constructor.name;
 		this.code = code;