K 10
svn:author
V 6
jilles
K 8
svn:date
V 27
2010-05-30T14:11:27.273938Z
K 7
svn:log
V 757
sh: Change interaction of command substitution and here documents.

If a command substitution contains a newline token, this no longer starts
here documents of outer commands. This way, we follow POSIX's idea of the
command substitution being a separate script more closely. It also matches
other shells better and is consistent with newline characters in quotes not
starting here documents.

The extension tested in parser/heredoc3.0 ($(cat <<EOF)\ntext\nEOF\n)
continues to be supported.

In particular, this change allows things like
  cat <<EOF && echo `pwd`
(a `` command substitution after a here document)
which formerly silently used an empty file as the here document, because the
EOF of the inner command "pwd" also forced an empty here document.

END