[stdlib] "prettier" implementation

Signed-off-by: Artemio Garza Reyna <artemiogr97@gmail.com>

stdlib/src/tempfile/tempfile.mojo

@@ -282,21 +282,23 @@ struct NamedTemporaryFile:
             var potential_name = final_dir / (
                 prefix + _get_random_name() + suffix
             )
-            if not os.path.exists(potential_name):
+            if os.path.exists(potential_name):
+                continue
+            try:
                 # TODO for now this name could be relative,
                 # python implementation expands the path,
                 # but several functions are not yet implemented in mojo
                 # i.e. abspath, normpath
                 self.name = potential_name.__fspath__()
-                break
+                self._file_handle = FileHandle(
+                    potential_name.__fspath__(), mode=mode
+                )
+                return
+            except:
+                continue
         else:
             raise Error("Failed to create temporary file")
 
-        try:
-            self._file_handle = FileHandle(self.name, mode=mode)
-        except:
-            raise Error("Failed to create temporary file")
-
     @always_inline
     fn __del__(owned self):
         """Closes the file handle."""