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, 3 insertions, 3 deletions

diff --git a/core/io/config_file.cpp b/core/io/config_file.cpp
index 33f992e153..b2300574f8 100644
--- a/core/io/config_file.cpp
+++ b/core/io/config_file.cpp
@@ -183,7 +183,7 @@ Error ConfigFile::_internal_save(FileAccess *file) {
 		if (E != values.front()) {
 			file->store_string("\n");
 		}
-		if (E.key() != "") {
+		if (!E.key().is_empty()) {
 			file->store_string("[" + E.key() + "]\n\n");
 		}
 
@@ -287,9 +287,9 @@ Error ConfigFile::_parse(const String &p_path, VariantParser::Stream *p_stream)
 			return err;
 		}
 
-		if (assign != String()) {
+		if (!assign.is_empty()) {
 			set_value(section, assign, value);
-		} else if (next_tag.name != String()) {
+		} else if (!next_tag.name.is_empty()) {
 			section = next_tag.name;
 		}
 	}