fix(pretty-printer): format empty blocks without extra empty line

[i582]

With this PR the following code:

fun foo() {

}

will be formatted as:

fun foo() { }

Issue

Closes #1039.

Checklist

• I have updated CHANGELOG.md
• I have added tests to demonstrate the contribution is correctly implemented: this usually includes both positive and negative tests, showing the happy path(s) and featuring intentionally broken cases
• I have run all the tests locally and no test failure was reported
• I have run the linter, formatter and spellchecker
• I did not do unrelated and/or undiscussed refactorings

[anton-trunov]

Let's add one space character between the curly braces { }. Editor insert pairs of curly braces automatically, so I usually add one to indicate I haven't forgotten to put statements between the braces.

[i582]

Let's add one space character between the curly braces { }. Editor insert pairs of curly braces automatically, so I usually add one to indicate I haven't forgotten to put statements between the braces.

Done