${<file} (Was: [PATCH?] Nofork and removing newlines)

[Stephane Chazelas <stephane@chazelas.org>]

By the way, if ${ cmd } preserves trailing newlines, it would
be useful to also have ${<file} as a variant of $(<file) that
preserves trailing newlines (and remove the need for a zslurp).

"${ <file}" already does but that's via running $READNULLCMD so
that could be optimized.

ksh93 and mksh both support optimised ${ <file;} (also ${<file;}
in ksh93), but they do trim trailing newline characters so
AFAICT, they're no different from $(<file).

See also the

$(<<'EOF'
multi-line
text
EOF)

of mksh which actually skips the creation of the here-doc and is
in effect a form of multi-line quoting (though also trims
trailing newlines). Also works with:

${ <<'EOF'
multi-line
test
EOF
}

-- 
Stephane