Inline variants syntax

In most cases, when setting variant specific code, you're not sharing any code
within format.

Inline syntax can vastly simplify defining variants in those situations:

  respond_to do |format|
    format.js { render "trash" }
    format.html do |variant|
      variant.phone { redirect_to progress_path }
      variant.none  { render "trash" }
    end
  end

Becomes:

  respond_to do |format|
    format.js         { render "trash" }
    format.html.phone { redirect_to progress_path }
    format.html.none  { render "trash" }
  end

1 files changed, 1 insertions, 0 deletions

diff --git a/actionpack/test/fixtures/respond_to/variant_inline_syntax_without_block.html+phone.erb b/actionpack/test/fixtures/respond_to/variant_inline_syntax_without_block.html+phone.erb
new file mode 100644
index 0000000000..cd222a4a49
--- /dev/null
+++ b/actionpack/test/fixtures/respond_to/variant_inline_syntax_without_block.html+phone.erb
@@ -0,0 +1 @@
+phone
\ No newline at end of file