Hi, mf and mpost behave differently from the *tex programs, when quit by ^D on the command line: They do not give a linefeed.
For the other TeX programs this has been corrected through their *.ch files, but somehow not for mf and mpost. Is this intentional? Change in mf.ch, line 461 would be: replace write by write_ln Change in mp.ch, line 512 would be: replace write by write_ln. Greetings Hartmut -- Hartmut Henkel, Oftersheim, Germany