repl: reorder want/got into got/want
repl: reorder want/got into got/want

This CL reverts the display of want/got into got/want in order to
follow good Go practices.
Also align got/want display so as to ease deciphering the error
for normal humans.

Signed-off-by: Sebastien Binet <be0c0d1298e63814a95fcb7523d1ca1345b4ca1f@cern.ch>

go-python/gpython,go-python/gpython,go-python/gpython,go-python/gpython,go-python/gpython,go-python/gpython