[Lazarus] How to use strings properly with fixes_1_6 and FPC 3.0.0?

[Gabor Boros]

2016. 10. 21. 12:48 keltezéssel, Jürgen Hestermann via Lazarus írta:
> If you realy need the character position/length, then
> you have to use UTF8Length/UTF8Copy/etc.
> But as said: It is only needed in special circumstances.
> Still you have to know when to use what.

I will know if somebody describe what a difference between á and an á 
characters in two points of my program. I answered to Juha's reply with 
two short examples. Don't understand why an á character/string different 
for example from a ReadLn and from Edit1.Text.

Gabor