If you want to display this a little nicer than raw JSON …
terraform validate -json | jq -r '[ del( .diagnostics[] | select( .detail | startswith( "Experimental features" ) ) ) | .diagnostics[] | { Detail:.detail, Address:.address, Filename:.range.filename, Line:.range.start.line } ] | ( .[0] | keys_unsorted | ( . , map( length*"-" ) ) ), .[] | map(.) | @tsv' | column -ts $'\t'
which will produce something like:
Detail Address Filename Line
------ ------- -------- ----
Use the aws_s3_bucket_acl resource instead module.efs_backup.aws_s3_bucket.efs_backup modules/efs_backup/s3.tf 4
Use the aws_s3_bucket_lifecycle_configuration resource instead module.efs_backup.aws_s3_bucket.efs_backup modules/efs_backup/s3.tf 1
Use the aws_s3_bucket_acl resource instead aws_s3_bucket.config_recorder_bucket aws-config.tf 191
[EDIT: The above will require jq v1.6]