minor change

app/views/exercises/_editor_button.html.slim

@@ -1,4 +1,4 @@
-button.btn class=(local_assigns[:classes] || 'btn-primary') *(local_assigns[:data] || {}) id=id title=local_assigns[:title] type='button'
+button.btn class=local_assigns.fetch(:classes, 'btn-primary') *local_assigns.fetch(:data, {}) id=id title=local_assigns[:title] type='button'
   i.fa.fa-circle-o-notch.fa-spin
   i class=icon
   = label

app/views/shared/_edit_button.html.slim

@@ -1 +1 @@
-= link_to(t('shared.edit'), local_assigns.has_key?(:path) ? path : send(:"edit_#{object.class.name.underscore}_path", object), class: 'btn btn-default pull-right')
+= link_to(t('shared.edit'), local_assigns.fetch(:path, send(:"edit_#{object.class.name.underscore}_path", object), class: 'btn btn-default pull-right')

app/views/shared/_new_button.html.slim

@@ -1,4 +1,4 @@
 - if policy(model).new?
-  a.btn.btn-success href=(local_assigns.has_key?(:path) ? path : send(:"new_#{model.model_name.singular}_path"))
+  a.btn.btn-success href=local_assigns.fetch(:path, send(:"new_#{model.model_name.singular}_path"))
     i.fa.fa-plus
     = t('shared.new_model', model: model.model_name.human)