Revert default chunk name change

Author: khvzak

src/state.rs

@@ -1021,9 +1021,7 @@ impl Lua {
     ) -> Chunk<'a> {
         Chunk {
             lua: self.weak(),
-            name: chunk
-                .name()
-                .unwrap_or_else(|| format!("@{}:{}", location.file(), location.line())),
+            name: chunk.name().unwrap_or_else(|| location.to_string()),
             env: chunk.environment(self),
             mode: chunk.mode(),
             source: chunk.source(),

tests/chunk.rs

@@ -7,7 +7,7 @@ fn test_chunk_methods() -> Result<()> {
     let lua = Lua::new();
 
     #[cfg(unix)]
-    assert!(lua.load("return 123").name().starts_with("@tests/chunk.rs"));
+    assert!(lua.load("return 123").name().contains("tests/chunk.rs"));
     let chunk2 = lua.load("return 123").set_name("@new_name");
     assert_eq!(chunk2.name(), "@new_name");