[v8] Remove useless new lines in help

[marckhouzam]

Description of the Change

Remove extra new lines from the usage to make the help and generated documentation more readable.

While at it replace a set of spaces with a tab for an import.

Testing done

Before the PR, notice the below 3 usage sections have extra empty lines:

$ ./out/cf delete-orphaned-routes -h
NAME:
   delete-orphaned-routes - Delete all orphaned routes in the currently targeted space (i.e. those that are not mapped to an app or service instance)

USAGE:
   cf delete-orphaned-routes [-f]


OPTIONS:
   -f      Force deletion without confirmation

SEE ALSO:
   delete-route, routes

$ ./out/cf delete-service-broker -h
NAME:
   delete-service-broker - Delete a service broker

USAGE:
   cf delete-service-broker SERVICE_BROKER [-f]



OPTIONS:
   -f      Force deletion without confirmation

SEE ALSO:
   delete-service, purge-service-offering, service-brokers

$ ./out/cf update-buildpack -h
NAME:
   update-buildpack - Update a buildpack

USAGE:
   cf update-buildpack BUILDPACK [-p PATH | -s STACK | --assign-stack NEW_STACK] [-i POSITION] [--rename NEW_NAME] [--enable|--disable] [--lock|--unlock]

TIP:
When using the 'buildpack' lifecycle type, Path should be a zip file, a url to a zip file, or a local directory. When using the 'cnb' lifecycle, Path should be a cnb file or gzipped oci image. Position is a positive integer, sets priority, and is sorted from lowest to highest.

Use '--assign-stack' with caution. Associating a buildpack with a stack that it does not support may result in undefined behavior. Additionally, changing this association once made may require a local copy of the buildpack.



OPTIONS:
   --assign-stack       Assign a stack to a buildpack that does not have a stack association
   --disable            Disable the buildpack from being used for staging
   --enable             Enable the buildpack to be used for staging
   --lock               Lock the buildpack to prevent updates
   --path, -p           Path to directory or zip file
   --position, -i       The order in which the buildpacks are checked during buildpack auto-detection
   --rename             Rename an existing buildpack
   --stack, -s          Specify stack to disambiguate buildpacks with the same name
   --lifecycle, -l      Specify lifecycle to disambiguate buildpacks with the same name
   --unlock             Unlock the buildpack to enable updates

SEE ALSO:
   buildpacks, create-buildpack, delete-buildpack

With the PR, notice the usage no longer has the extra empty lines:

$ ./out/cf delete-orphaned-routes -h
NAME:
   delete-orphaned-routes - Delete all orphaned routes in the currently targeted space (i.e. those that are not mapped to an app or service instance)

USAGE:
   cf delete-orphaned-routes [-f]

OPTIONS:
   -f      Force deletion without confirmation

SEE ALSO:
   delete-route, routes
$ ./out/cf delete-service-broker -h
NAME:
   delete-service-broker - Delete a service broker

USAGE:
   cf delete-service-broker SERVICE_BROKER [-f]

OPTIONS:
   -f      Force deletion without confirmation

SEE ALSO:
   delete-service, purge-service-offering, service-brokers
$ ./out/cf update-buildpack -h
NAME:
   update-buildpack - Update a buildpack

USAGE:
   cf update-buildpack BUILDPACK [-p PATH | -s STACK | --assign-stack NEW_STACK] [-i POSITION] [--rename NEW_NAME] [--enable|--disable] [--lock|--unlock]

TIP:
When using the 'buildpack' lifecycle type, Path should be a zip file, a url to a zip file, or a local directory. When using the 'cnb' lifecycle, Path should be a cnb file or gzipped oci image. Position is a positive integer, sets priority, and is sorted from lowest to highest.

Use '--assign-stack' with caution. Associating a buildpack with a stack that it does not support may result in undefined behavior. Additionally, changing this association once made may require a local copy of the buildpack.

OPTIONS:
   --assign-stack       Assign a stack to a buildpack that does not have a stack association
   --disable            Disable the buildpack from being used for staging
   --enable             Enable the buildpack to be used for staging
   --lock               Lock the buildpack to prevent updates
   --path, -p           Path to directory or zip file
   --position, -i       The order in which the buildpacks are checked during buildpack auto-detection
   --rename             Rename an existing buildpack
   --stack, -s          Specify stack to disambiguate buildpacks with the same name
   --lifecycle, -l      Specify lifecycle to disambiguate buildpacks with the same name
   --unlock             Unlock the buildpack to enable updates

SEE ALSO:
   buildpacks, create-buildpack, delete-buildpack