What is wrong with using \begin{flushleft}?

[Gavin Smith]

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.