it can be easy to miss the stderr when forgetting to use -g with -a when processing a stream

[trentm]

For example:

[16:23:31 trentm@danger0:~/tm/json (master)]
$ cat foo.json
{"foo":"bar"}
{"foo":"bar"}
{asdf}
{"foo":"bar"}
{qwer}
{"foo":"bar"}
[16:23:40 trentm@danger0:~/tm/json (master)]
$ cat foo.json | json -a foo
json: error: input is not JSON: Syntax error at line 2, column 1:
        {"foo":"bar"}
        ^
{"foo":"bar"}
{"foo":"bar"}
{asdf}
{"foo":"bar"}
{qwer}
{"foo":"bar"}

json here will print the error to stderr, and then the full content of the file to stdout. If the file is large, it is way too easy to miss the error that can be the hint to know to use -g.

One idea is to move that stderr to the end of the output to make it harder to miss.

Other ideas welcome too.

[trentm]

@davepacheco mentioned that if we do the work to allow json to skip non-JSON lines in streaming mode, it "would be nice if it emitted errors for each bad line, but you still got all the other output".