Contradictory to expectations, `mgmt run lang metadata.yaml` would
produce an error similar to the following, which is likely unexpected
from the user perspective:
2020-11-24 12:24:08.330968 I | cli: lang: lexing/parsing...
2020-11-24 12:24:08.331153 I | run: error: cli parse error: could not generate AST: parser: `syntax error: unexpected DOT` @1:1
Produce a user-friendly warning instead, hinting with the supported
usage:
2020-11-24 13:15:01.686659 I | run: error: cli parse error: could not activate an input parser: unexpected raw code 'metadata.yaml'. Did you mean './metadata.yaml'?
Signed-off-by: Joe Groocock <me@frebib.net>
4a2864701c