parser: Save/restore here-documents in command substitution

This patch changes the parsing of here-documents within command
substitution, both old style and new style.  In particular, the
original here-document list is saved upon the beginning of parsing
command substitution and restored when exiting.

This means that here-documents outside of command substitution
can no longer be filled by text within it and vice-versa.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

0 files changed, 0 insertions, 0 deletions