HAMLLint: Fix `SpaceInsideHashAttributes` offences

app/views/explore/projects/_filter.html.haml

app/views/help/_shortcuts.html.haml

app/views/help/ui.html.haml

app/views/import/_githubish_status.html.haml

app/views/import/bitbucket/status.html.haml

app/views/import/fogbugz/status.html.haml

app/views/import/gitlab/status.html.haml

app/views/import/google_code/new.html.haml

app/views/import/google_code/status.html.haml

app/views/kaminari/gitlab/_page.html.haml

app/views/layouts/_head.html.haml

app/views/layouts/_search.html.haml

app/views/layouts/application.html.haml

app/views/layouts/devise.html.haml

app/views/layouts/devise_empty.html.haml

app/views/layouts/devise_mailer.html.haml

app/views/layouts/errors.html.haml

app/views/layouts/header/_default.html.haml

app/views/layouts/nav/_admin_settings.html.haml

app/views/layouts/nav/_group_settings.html.haml