Updated the description for the SOURCE_MIRROR_FETCH variable
so that it actually made sense. The [doc] string was also
updated.
Found a typo elsewhere that was fixed when I spell-checked the
file.
(From yocto-docs rev: 609f09231815f80ea3fd800e0b5d9a4fbad110cc)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>