crt: tests: reformat source files

These changes include:

- fix indentation; in files which use both spaces and tabs for indentation,
  convert indentation to spaces
- removing trailing whitespace
- removing multiple newlines at the end of file

Some files also include other minor changes.

Signed-off-by: Kirill Makurin <maiddaisuki@outlook.com>
Signed-off-by: LIU Hao <lh_mouse@126.com>