`circleci config pack` not respect newline

[ansromanov]

circleci config pack added an additional trailing newline regardless if source configs already have it.
So, in following example src config temp_cfg.yml already has trailing newline, and temp_cfg2.yml will have 2 trailing newline after packing.
It could break workflows where pre-commit hook end-of-file-fixer is using.

andreiromanov > circleci config pack temp_cfg.yml > temp_cfg2.yml
andreiromanov > diff temp_cfg.yml temp_cfg2.yml 
18a19
> 

Meta:

CircleCI CLI Version:

Macos Sequioia 15.5

andreiromanov > circleci version    
0.1.32367+16777db (homebrew)

andreiromanov > circleci diagnostic                              

---
CircleCI CLI Diagnostics
---
Debugger mode: false
Config found: /Users/andreiromanov/.circleci/cli.yml
API host: https://circleci.com
API endpoint: graphql-unstable
OK, got a token.
Hello, Andrei Romanov.