Fix a missing space in help message of bare option

[PeterDaveHello]

A space seem to be missed in the help message.

  --bare / --not-bare             Output vulnerable packages only. Useful in
                                  combination with other tools.Default: --not-
                                  bare

$ safety check --help
Usage: safety check [OPTIONS]

Options:
  --key TEXT                      API Key for pyup.io's vulnerability
                                  database. Can be set as SAFETY_API_KEY
                                  environment variable. Default: empty

  --db TEXT                       Path to a local vulnerability database.
                                  Default: empty

  --json / --no-json              Output vulnerabilities in JSON format.
                                  Default: --no-json

  --full-report / --short-report  Full reports include a security advisory (if
                                  available). Default: --short-report

  --bare / --not-bare             Output vulnerable packages only. Useful in
                                  combination with other tools.Default: --not-
                                  bare
.
.
.

[codecov]

Codecov Report

Merging #327 (5a16242) into master (2e5b46b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #327   +/-   ##
=======================================
  Coverage   68.56%   68.56%           
=======================================
  Files           8        8           
  Lines         474      474           
=======================================
  Hits          325      325           
  Misses        149      149           

Impacted Files	Coverage Δ
safety/cli.py	56.84% <ø> (ø)

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[rafaelpivato]

Thanks for this!