If source formatter doesn't work...

I do not know why it happened. The source formatter (CTRL + D) isn't working on some files. I found a solution for this.

1. Open Project Manager (CTRL + ALT + F11)
2. Select the file that the source code formatter does not work with.
3. Rename it. (e.g., Form1.pas >> Form101.pas)
4. Press CTRL + D.
5. Rename. (e.g., Form101.pas >> Form1.pas)
6. Press CTRL + D.

That's all...