Better deprecation message (#936)

Author: OskarStark

src/Faker/Provider/Image.php

@@ -55,7 +55,8 @@ public static function imageUrl(
         trigger_deprecation(
             'fakerphp/faker',
             '1.20',
-            'Provider is deprecated and will no longer be available in Faker 2. Please use a custom provider instead',
+            '%s is deprecated and will no longer be available in Faker 2. Please use a custom provider instead',
+            __CLASS__,
         );
 
         // Validate image format
@@ -119,7 +120,8 @@ public static function image(
         trigger_deprecation(
             'fakerphp/faker',
             '1.20',
-            'Provider is deprecated and will no longer be available in Faker 2. Please use a custom provider instead',
+            '%s is deprecated and will no longer be available in Faker 2. Please use a custom provider instead',
+            __CLASS__,
         );
 
         $dir = null === $dir ? sys_get_temp_dir() : $dir; // GNU/Linux / OS X / Windows compatible
@@ -173,7 +175,8 @@ public static function getFormats(): array
         trigger_deprecation(
             'fakerphp/faker',
             '1.20',
-            'Provider is deprecated and will no longer be available in Faker 2. Please use a custom provider instead',
+            '%s is deprecated and will no longer be available in Faker 2. Please use a custom provider instead',
+            __CLASS__,
         );
 
         return array_keys(static::getFormatConstants());
@@ -184,7 +187,8 @@ public static function getFormatConstants(): array
         trigger_deprecation(
             'fakerphp/faker',
             '1.20',
-            'Provider is deprecated and will no longer be available in Faker 2. Please use a custom provider instead',
+            '%s is deprecated and will no longer be available in Faker 2. Please use a custom provider instead',
+            __CLASS__,
         );
 
         return [