Leading or trailing white space characters in file names

[Allen Smith]

We also should decide whether it's valid to have white space before the line type number at the beginning of the line. I think this is also ambiguous.

I think if we go with the tokens separated by with space text above, leading white space on a line is automatically valid. The only exception is the file name which at it start 'disables' the normal white space / token behavior.

I don't consider leading whitespace on a line to be valid. I think there's a difference between "separates" and "starts with." My parser will accept it some places by accident, but considers it a syntax error in many other places.

Have files containing lines with leading whitespace been observed in the wild?

Allen