Customization of `_config.yml` via `jekyll-init` script does not work

[S0AndS0]

Describe the bug

Lines 181 through 193 of jekyll-init that handle the following options...

--title
--email
--twitter-username
--github-username

... do not seem to edit the _config.yml file as intended.

Furthermore, when --title parameter is used the repository name is overwritten, and the --title parameter is not parsed correctly when spaces are present.

To Reproduce

• Example one input...

ssh HOST jekyll-init\
  --title 'test title'\
  --email 'test@example.tld'\
  --twitter-username 'S0_And_S0'\
  --github-username 'S0AndS0'\
  test-repo\
  --help

• Example one output...

# ...
# title
#  Name of repository to internalize or add Jekyll gh-pages branch to
# ...
# --title test
# --email 
# --twitter-username 
# --github-username USER

• Example one _config.yml (snip)

title: test
email: your-email@example.com
twitter_username: jekyllrb
github_username: USER

• Example two input...

ssh HOST jekyll-init\
  --title='test title'\
  --email='test@example.tld'\
  --twitter-username='S0_And_S0'\
  --github-username='S0AndS0'\
  test-repo\
  --help

• Example two output...

# ...
# title
#  Name of repository to internalize or add Jekyll gh-pages branch to
# ...
# --title test
# --email test@example.tld
# --twitter-username S0_And_S0
# --github-username S0AndS0

• Example two _config.yml (snip)

title: test
email: test@example.tld-email@example.com
twitter_username: jekyllrb
github_username: S0AndS0

In both of the above examples a repository is created under ~/git/title instead of ~/git/test-repo

Expected behavior

In either of the above cases the configuration file should be similar to...

title: test title
email: test@example.tld
twitter_username: S0_And_S0
github_username: S0AndS0

... and the repository should be created under ~/git/test-repo