Change summary should only output line separator if there is a summary to show.

[mitchell-as]

DX-2962 Row gap between messages when install language

Also output trailing line separator for CVE info.

% ../../cli/build/state languages install [email protected]
█ Installing Language (Beta)

Beta Feature: This feature is still in beta and may be unstable.

Operating on project org/project, located at /path/to/project.

 • Searching for python in the ActiveState Catalog ✔ Found
 • Creating commit ✔ Done
 • Resolving Dependencies ✔ Done
 • Checking for vulnerabilities (CVEs) on python and its dependencies x Unsafe

   Warning: Dependency has 2 known vulnerabilities (CVEs)

    • 1 High: CVE-2023-36632
    • 1 Medium: CVE-2023-27043

   For more information on these vulnerabilities run 'state security open <ID>'.
   To disable prompting for vulnerabilities run 'state config set security.prompt.enabled false'.

Language updated: [email protected]
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