fix: empty log: "...does not begin with a digit."
fix: empty log: "...does not begin with a digit."

(issue #1137)

graphicore/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,moyogo/fontbakery,graphicore/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,moyogo/fontbakery