fix(rome_cli): don't add newline when formatting from stdin

[ematipico]

Summary

Fixes #4197

Test Plan

Tested locally

Documentation

• The PR requires documentation
• I will create a new PR to update the documentation

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[github-actions]

Parser conformance results on ubuntu-latest

js/262

Test result	main count	This PR count	Difference
Total	48647	48647	0
Passed	47582	47582	0
Failed	1065	1065	0
Panics	0	0	0
Coverage	97.81%	97.81%	0.00%

jsx/babel

Test result	main count	This PR count	Difference
Total	40	40	0
Passed	37	37	0
Failed	3	3	0
Panics	0	0	0
Coverage	92.50%	92.50%	0.00%

symbols/microsoft

Test result	main count	This PR count	Difference
Total	6093	6093	0
Passed	1783	1783	0
Failed	4310	4310	0
Panics	0	0	0
Coverage	29.26%	29.26%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	639	639	0
Passed	568	568	0
Failed	71	71	0
Panics	0	0	0
Coverage	88.89%	88.89%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	16740	16740	0
Passed	12815	12815	0
Failed	3925	3925	0
Panics	0	0	0
Coverage	76.55%	76.55%	0.00%