Finish AsciiMath-fi tests and proofread them

[samimaattaCelia]

To-do for me

After these I will make a pull request.

• Finish tests for AsciiMath-fi
• Proofread tests

The name of the braille code should be "Luetus-matematiikka" (Luetus maths). "Luetus" is a program in Finland that is used to read study books for people with visual impairment, so the term is familiar to them. The filename could still be in the vein of "AsciiMath-fi" for the information of developers and translators.