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pactl: SUBSCRIBE add a newline after every json message

acheronfail requested to merge acheronfail/pulseaudio:acheronfail/newlines-for-pactl-subscribe into master

Right now, when calling pactl -f json subscribe each JSON message is printed on the same line and never on a newline.

(I believe I overlooked this when I first added JSON support to pactl)

An example:

$ pactl -f json subscribe
{"index":1012,"event":"new","on":"client"}{"index":66,"event":"change","on":"source"}{"index":47,"event":"change","on":"card"}{"index":1012,"event":"remove","on":"client"}{"index":65,"event":"change","on":"sink"}{"index":65,"event":"change","on":"source"}{"index":47,"event":"change","on":"card"}{"index":66,"event":"change","on":"source"}{"index":1013,"event":"new","on":"client"}{"index":1013,"event":"remove","on":"client"}{"index":1014,"event":"new","on":"client"}{"index":1014,"event":"remove","on":"client"}

This makes it very difficult for most command-line applications to parse and respond to the output, since they usually expect line terminations.

It's also technically invalid JSON: usually the newline separates JSON messages, but two objects on the same line (with no separator between them) is invalid in JSON.

Edited by acheronfail

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