I really don't like the idea of using fixed length of whitespace for delimiting scope instead of using explicit markers. It's not really a language issue, just syntax preference.
It always reminds me of the old Punchcard Fortran fixed column layout
" Columns 1 to 5 were the label field: a sequence of digits here was taken as a label for the purpose of a GOTO or a FORMAT reference in a WRITE or READ statement. Column 6 was a continuation field: a non-blank character here caused the card to be taken as a continuation of the statement on the previous card. Columns 7 to 72 served as the statement field"
