Add line break to uploaded message

[satotake]

s3deploy has 3 types of output about file handling.

1. upload
2. delete (verbose only)
3. skip (verbose only)

delete and skip messages has a line break at the end of string.
On the other hand upload has whitespace instead of \n

I would like to add line breaks upload messages.

[codecov-io]

Codecov Report

Merging #47 into master will increase coverage by 0.17%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #47      +/-   ##
==========================================
+ Coverage   67.12%   67.29%   +0.17%     
==========================================
  Files           8        8              
  Lines         581      581              
==========================================
+ Hits          390      391       +1     
+ Misses        161      160       -1     
  Partials       30       30

Impacted Files	Coverage Δ
lib/deployer.go	81.32% <100%> (+0.6%)	⬆️

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[bep]

I implemented it like this for a good reason. Changing it would require an even better reason, which would need more language than "I would like".

[satotake]

Thank you for your response.

The reason is consistency about output formatting and readability.

For example, I wrote a script, which reads s3deploy's output to monitor which files are mutated in remote.
Therefore, if it shows one message per single line, parsing would be easier.

[satotake]

Current implementation of this PR changes all upload messages.

If you mind it, how do you think about inserting line breaks into upload message only if verbose mode?

[satotake]

I missed #45 , sorry but it is related to this PR