Replace String comparisons with "", String() to is_empty()

Also:
- Adds two stress tests to test_string.h
- Changes to .empty() on std::strings

1 files changed, 1 insertions, 1 deletions

diff --git a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
index e6d9a60f94..8807ebf134 100644
--- a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
+++ b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
@@ -47,7 +47,7 @@ void SceneShaderForwardMobile::ShaderData::set_code(const String &p_code) {
 	uniforms.clear();
 	uses_screen_texture = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}