[luatex] 'Out by one' when writing to log file

[Joseph Wright]

Hello all,

Another formatting bug/difference between LuaTeX and pdfTeX/XeTeX. With
the example

\immediate\write-1{%
12345678901234567890123456789012345678901234567890123456789012345678901234567890%
}

LuaTeX writes all of the chars (80 of them) to one line in the log. On
the other hand, pdfTeX and XeTeX write 79 chars then wrap, as expected from

    max_print_line = 79

in texmf.cnf. (Testing with TL2014 pretest.)

Bug?
-- 
Joseph Wright