use humanize and upcase_first for checkbox labels

matches how the names of the dietary restrictions are displayed when
showing a profile.

Author: mikej

app/views/member/details/edit.html.haml

@@ -15,7 +15,8 @@
           = f.input :about_you, as: :text, label: t('member.details.edit.coach.about_you'), input_html: { rows: 3 }, required: true
         - else
           = f.input :about_you, as: :text, label: t('member.details.edit.student.about_you'), input_html: { rows: 3 }, required: true
-        = f.input :dietary_restrictions, collection: Member::DIETARY_RESTRICTIONS, as: :check_boxes, label_method: :titleize
+        = f.input :dietary_restrictions, collection: Member::DIETARY_RESTRICTIONS, as: :check_boxes,
+          label_method:  ->(r) { r.humanize.upcase_first }
         = f.input :other_dietary_restrictions, placeholder: 'Other dietary restrictions',
             wrapper_html: { class: class_names('mt-n3', 'd-none': !@member.other_dietary_restrictions?) }, label_html: { class: 'sr-only' }
         = f.input :newsletter, as: :boolean, checked_value: true, unchecked_value: false

app/views/members/_new.html.haml

@@ -13,7 +13,8 @@
     .col-12
       = f.input :about_you, as: :text, label: 'Tell us a little bit about yourself', input_html: { rows: 3 }, required: true
     .col-12
-      = f.input :dietary_restrictions, collection: Member::DIETARY_RESTRICTIONS, as: :check_boxes, label_method: :titleize
+      = f.input :dietary_restrictions, collection: Member::DIETARY_RESTRICTIONS, as: :check_boxes,
+        label_method:  ->(r) { r.humanize.upcase_first }
       = f.input :other_dietary_restrictions, placeholder: 'Other dietary restrictions',
         wrapper_html: { class: class_names('mt-n3', 'd-none': !@member.other_dietary_restrictions?) }, label_html: { class: 'sr-only' }
     - if @member.coach?