Tink CLI errors now end with a newline

[gauravgahlot]

Description

With this change, the CLI errors will now end with a newline. Therefore, making it easier for a user to read the error message.

Why is this needed

Fixes: #336

How Has This Been Tested?

Tested on the local vagrant setup.

/ # tink hardware id
Error: requires at least one id
Usage:
  tink hardware id [flags]

Examples:
tink hardware id 224ee6ab-ad62-4070-a900-ed816444cec0 cb76ae54-93e9-401c-a5b2-d455bb3800b1

Flags:
  -h, --help   help for id

Global Flags:
  -f, --facility string   used to build grpc and http urls

requires at least one id
/ # 

How are existing users impacted? What migration steps/scripts do we need?

It's easier to read the error message now.

Checklist:

I have:

• updated the documentation and/or roadmap (if required)
• added unit or e2e tests
• provided instructions on how to upgrade

[codecov]

Codecov Report

Merging #337 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #337   +/-   ##
=======================================
  Coverage   23.79%   23.79%           
=======================================
  Files          14       14           
  Lines        1244     1244           
=======================================
  Hits          296      296           
  Misses        928      928           
  Partials       20       20           

---

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[thebsdbox]

Looks good to Me.

[invidian]

Thanks!