Changelog:
==========
-Fix compiler error when checking if required blocks in parent templates are empty.
-xmlattr filter does not allow keys with spaces.
-Make error messages stemming from invalid nesting of {% trans %} blocks more helpful
(cherry picked from OE-Core rev: 8a0524464583d69df7746253f5020c2c125a8e1f)
(From OE-Core rev: 0f0dcf520505d809599a63961ecb5b1e74053b24)
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
