proper metric for blanks -- NB: 70f7483df9cb discontinues coincidence of char_width with space width;
proper metric for blanks -- NB: 70f7483df9cb discontinues coincidence of char_width with space width;

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle