fix(v2): remove line break from end of code blocks

[lex111]

Motivation

Resolve #2352

Have you read the Contributing Guidelines on pull requests?

Yes

Test Plan

Suppose we have an indented code block:

```
      --chart string                                   A helm chart to deploy (e.g. ./chart or stable/mysql)

      --chart-repo string                              The helm chart repository url to use
      --chart-version string                           The helm chart version to use
      --component devspace list available-components   A predefined component to use (run devspace list available-components to see all available components)
      --context string
      --dockerfile string                              A dockerfile
  -h, --help                                           help for deployment
      --image string                                   A docker image to deploy (e.g. dscr.io/myuser/myrepo or dockeruser/repo:0.1 or mysql:latest)
      --manifests string                               The kubernetes manifests to deploy (glob pattern are allowed, comma separated, e.g. manifests/** or kube/pod.yaml)
```

Before this fix (the first line has no indent):

--chart string                                   A helm chart to deploy (e.g. ./chart or stable/mysql)
      --chart-repo string                              The helm chart repository url to use
      --chart-version string                           The helm chart version to use
      --component devspace list available-components   A predefined component to use (run devspace list available-components to see all available components)
      --context string
      --dockerfile string                              A dockerfile
  -h, --help                                           help for deployment
      --image string                                   A docker image to deploy (e.g. dscr.io/myuser/myrepo or dockeruser/repo:0.1 or mysql:latest)
      --manifests string                               The kubernetes manifests to deploy (glob pattern are allowed, comma separated, e.g. manifests/** or kube/pod.yaml)

After this fix (all indents is in place, as expected):

      --chart string                                   A helm chart to deploy (e.g. ./chart or stable/mysql)

      --chart-repo string                              The helm chart repository url to use
      --chart-version string                           The helm chart version to use
      --component devspace list available-components   A predefined component to use (run devspace list available-components to see all available components)
      --context string
      --dockerfile string                              A dockerfile
  -h, --help                                           help for deployment
      --image string                                   A docker image to deploy (e.g. dscr.io/myuser/myrepo or dockeruser/repo:0.1 or mysql:latest)
      --manifests string                               The kubernetes manifests to deploy (glob pattern are allowed, comma separated, e.g. manifests/** or kube/pod.yaml)

Related PRs

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[yangshun]

Can we use String.prototype.trimEnd() instead? It's much clearer than using Regex.

[lex111]

@yangshun no, this will delete all line breaks, this is hardly what we want. We need to remove only one line break (which we produce).
I mean, if the user left line breaks in their own code blocks, then they needs it and we should not delete them.

[yangshun]

Oh I see. Is it possible that we just don't add the last one instead of adding it somewhere and then removing it again?

I'll merge this.