Grape - Improve readability when multiple versions are defined

[katpadi]

In Grape, it's possible to define multiple versions e.g.:

class V1 < Grape::API
  version 'v1', 'v2'

  get '/foos' do
    # your code for GET /foo
  end
end

This produces a value for path and http.route that looks like this:

/["v1", "v2"]/foos/

Reference:

opentelemetry-ruby-contrib/instrumentation/grape/lib/opentelemetry/instrumentation/grape/event_handler.rb

Line 96 in 79fa587

version = endpoint.routes.first.options[:version]&.to_s

Perhaps this is to promote low cardinality URL as per specs but would it hurt if we add an ability or configuration to maybe produce something like:

/{v1|v2}/foos/
/(v1|v2)/foos/
/v1|v2/foos/
/{v1|v2}/foos/
/:version/foos/ # Static value?

I'm not sure if a pipe or any of my recommended symbols violate any spec but it's mainly for readability as ["v1", "v2"] looks like a typo or a misconfiguration.

Thoughts?

[arielvalentin]

Cc: @muripic

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