Rollup merge of #28872 - iwillspeak:master, r=Manishearth

Currently the explain command line flag requires full error codes, complete with
the leading zeros and the E at the beginning. This commit changes that,
if you don't supply a full error code then the error number is padded
out to the required size and the E is added to the beginning.

This means that where previously you would need to write E0001, you can
now write 0001, 001, 01 or just 1 to refer to the same error.

0 files changed, 0 insertions, 0 deletions