In the comments in LaTeX.pm it says that the flushleft environment in LaTeX does not match Texinfo because of a difference in "filling", but I did not understand what the difference was or which Texinfo command this referred to.
For @raggedright, the main difference between the texinfo.tex output and the current LaTeX output with flushleft is that in LaTeX, there is no hyphenation inside the block, but apart from this they seem the same and the output is acceptible. For @display and @format, which aren't filled, flushleft isn't being used anyway, so there is no problem here.
