[Config] Improve exception messages

Author: Nyholm

Loader/PhpFileLoader.php

@@ -102,7 +102,7 @@ private function executeCallback(callable $callback, ContainerConfigurator $cont
         foreach ($parameters as $parameter) {
             $reflectionType = $parameter->getType();
             if (!$reflectionType instanceof \ReflectionNamedType) {
-                throw new \InvalidArgumentException(sprintf('Could not resolve argument "%s" for "%s".', $parameter->getName(), $path));
+                throw new \InvalidArgumentException(sprintf('Could not resolve argument "$%s" for "%s".', $parameter->getName(), $path));
             }
             $type = $reflectionType->getName();
 
@@ -121,7 +121,7 @@ private function executeCallback(callable $callback, ContainerConfigurator $cont
                     try {
                         $configBuilder = $this->configBuilder($type);
                     } catch (InvalidArgumentException | \LogicException $e) {
-                        throw new \InvalidArgumentException(sprintf('Could not resolve argument "%s" for "%s".', $type.' '.$parameter->getName(), $path), 0, $e);
+                        throw new \InvalidArgumentException(sprintf('Could not resolve argument "%s" for "%s".', $type.' $'.$parameter->getName(), $path), 0, $e);
                     }
                     $configBuilders[] = $configBuilder;
                     $arguments[] = $configBuilder;
@@ -164,7 +164,7 @@ private function configBuilder(string $namespace): ConfigBuilderInterface
 
         if (!$this->container->hasExtension($alias)) {
             $extensions = array_filter(array_map(function (ExtensionInterface $ext) { return $ext->getAlias(); }, $this->container->getExtensions()));
-            throw new InvalidArgumentException(sprintf('There is no extension able to load the configuration for "%s". Looked for namespace "%s", found "%s".', $namespace, $namespace, $extensions ? implode('", "', $extensions) : 'none'));
+            throw new InvalidArgumentException(sprintf('There is no extension able to load the configuration for "%s". Looked for namespace "%s", found "%s".', $namespace, $alias, $extensions ? implode('", "', $extensions) : 'none'));
         }
 
         $extension = $this->container->getExtension($alias);