Output CLI inserts blank lines between entries within a snippet, not between snippets

[JoshuaKGoldberg]

Here's an example of the CLI result from an early Learning TypeScript run:

⠦ 1/1: ch04-objects.asciidoc: 15/22 ch04-objects-444
ch04-objects-444: Unexpected TypeScript error: 0:15-19: Cannot find name 'poem'.

ch04-objects-444: Unexpected TypeScript error: 1:4-8: Cannot find name 'poem'.

ch04-objects-444: Unexpected TypeScript error: 3:4-8: Cannot find name 'poem'.
⠧ 1/1: ch04-objects.asciidoc: 16/22 ch04-objects-455
ch04-objects-455: Unexpected TypeScript error: 0:4-8: Cannot find name 'poem'.

ch04-objects-455: Expected TypeScript error was not produced: 0:9-14:  Property 'pages' does not exist on type 'PoemWithPages | PoemWithRhymes'. Property 'pages' does not exist on type 'PoemWithRhymes'.

Note that the last ch04-objects-444 report has a blank before it but not after. These would be a little easier to read if the blank lines were between snippets instead. How about something like the following?

⠦ 1/1: ch04-objects.asciidoc: 15/22 ch04-objects-444
ch04-objects-444: Unexpected TypeScript error: 0:15-19: Cannot find name 'poem'.
ch04-objects-444: Unexpected TypeScript error: 1:4-8: Cannot find name 'poem'.
ch04-objects-444: Unexpected TypeScript error: 3:4-8: Cannot find name 'poem'.

⠧ 1/1: ch04-objects.asciidoc: 16/22 ch04-objects-455
ch04-objects-455: Unexpected TypeScript error: 0:4-8: Cannot find name 'poem'.
ch04-objects-455: Expected TypeScript error was not produced: 0:9-14:  Property 'pages' does not exist on type 'PoemWithPages | PoemWithRhymes'. Property 'pages' does not exist on type 'PoemWithRhymes'.