tab in source file may lead to irrelevant syntax errors

[lebotlan]

Consider a source file which contains tabs (\t)

tab.ml.gz

(tab.ml md5sum is 6684e09f9bb32a7ca8a570c86caa398e -- to check that no character conversion occured.)

let f x = (* the tabs are here *) x + 1 + 2 + (3 + 4)

When opening it in ocaml-top and running it, strange syntax errors appear as if the line with tabs was not completely parsed.

Syntax error: ')' expected, the highlighted '(' might be unmatched

Note : a source file may contain tabs when it is edited with another text editor (e.g. vi, or the kind of indecent text editor that students use at home).