@Doitsu
So this is my mistake and for this please accept my apologies. I just hope this mistake will help other people not to repeat it.
I had checked many times the
left column and saw nothing suspicious. I also thought I had inserted only one tab of fixed length per line. This is another -easy- practical tip to remember. There should be a way to colour the tabs in my text Editor.
So there is only the
locale question to solve.