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208655 |
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30-May-2010 |
jilles |
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.
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