Split some extremely long strings over multiple lines using squiggly heredocs

I'm not entirely convinced that testing walls of text like this is useful
anyway, but at least this approach makes the lines significantly less long.

test/helpers/user_roles_helper_test.rb

@@ -10,7 +10,13 @@ class UserRolesHelperTest < ActionView::TestCase
     assert_dom_equal "", icon
 
     icon = role_icon(create(:moderator_user), "moderator")
-    assert_dom_equal '<picture><source srcset="/images/roles/moderator.svg" type="image/svg+xml" /><img srcset="/images/roles/moderator.svg" border="0" alt="This user is a moderator" title="This user is a moderator" src="/images/roles/moderator.png" width="20" height="20" /></picture>', icon
+    expected = <<~HTML.delete("\n")
+      <picture>
+      <source srcset="/images/roles/moderator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/moderator.svg" border="0" alt="This user is a moderator" title="This user is a moderator" src="/images/roles/moderator.png" width="20" height="20" />
+      </picture>
+    HTML
+    assert_dom_equal expected, icon
   end
 
   def test_role_icon_administrator
@@ -18,11 +24,27 @@ class UserRolesHelperTest < ActionView::TestCase
 
     user = create(:user)
     icon = role_icon(user, "moderator")
-    assert_dom_equal %(<a confirm="Are you sure you want to grant the role `moderator&#39; to the user `#{user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(user.display_name)}/role/moderator/grant"><picture><source srcset="/images/roles/blank_moderator.svg" type="image/svg+xml" /><img srcset="/images/roles/blank_moderator.svg" border="0" alt="Grant moderator access" title="Grant moderator access" src="/images/roles/blank_moderator.png" width="20" height="20" /></picture></a>), icon
+    expected = <<~HTML.delete("\n")
+      <a confirm="Are you sure you want to grant the role `moderator&#39; to the user `#{user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(user.display_name)}/role/moderator/grant">
+      <picture>
+      <source srcset="/images/roles/blank_moderator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/blank_moderator.svg" border="0" alt="Grant moderator access" title="Grant moderator access" src="/images/roles/blank_moderator.png" width="20" height="20" />
+      </picture>
+      </a>
+    HTML
+    assert_dom_equal expected, icon
 
     moderator_user = create(:moderator_user)
     icon = role_icon(moderator_user, "moderator")
-    assert_dom_equal %(<a confirm="Are you sure you want to revoke the role `moderator&#39; from the user `#{moderator_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(moderator_user.display_name)}/role/moderator/revoke"><picture><source srcset="/images/roles/moderator.svg" type="image/svg+xml" /><img srcset="/images/roles/moderator.svg" border="0" alt="Revoke moderator access" title="Revoke moderator access" src="/images/roles/moderator.png" width="20" height="20" /></picture></a>), icon
+    expected = <<~HTML.delete("\n")
+      <a confirm="Are you sure you want to revoke the role `moderator&#39; from the user `#{moderator_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(moderator_user.display_name)}/role/moderator/revoke">
+      <picture>
+      <source srcset="/images/roles/moderator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/moderator.svg" border="0" alt="Revoke moderator access" title="Revoke moderator access" src="/images/roles/moderator.png" width="20" height="20" />
+      </picture>
+      </a>
+    HTML
+    assert_dom_equal expected, icon
   end
 
   def test_role_icons_normal
@@ -32,10 +54,26 @@ class UserRolesHelperTest < ActionView::TestCase
     assert_dom_equal "  ", icons
 
     icons = role_icons(create(:moderator_user))
-    assert_dom_equal '  <picture><source srcset="/images/roles/moderator.svg" type="image/svg+xml" /><img srcset="/images/roles/moderator.svg" border="0" alt="This user is a moderator" title="This user is a moderator" src="/images/roles/moderator.png" width="20" height="20" /></picture>', icons
+    expected = "  " + <<~HTML.delete("\n")
+      <picture>
+      <source srcset="/images/roles/moderator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/moderator.svg" border="0" alt="This user is a moderator" title="This user is a moderator" src="/images/roles/moderator.png" width="20" height="20" />
+      </picture>
+    HTML
+    assert_dom_equal expected, icons
 
     icons = role_icons(create(:super_user))
-    assert_dom_equal ' <picture><source srcset="/images/roles/administrator.svg" type="image/svg+xml" /><img srcset="/images/roles/administrator.svg" border="0" alt="This user is an administrator" title="This user is an administrator" src="/images/roles/administrator.png" width="20" height="20" /></picture> <picture><source srcset="/images/roles/moderator.svg" type="image/svg+xml" /><img srcset="/images/roles/moderator.svg" border="0" alt="This user is a moderator" title="This user is a moderator" src="/images/roles/moderator.png" width="20" height="20" /></picture>', icons
+    expected = " " + <<~HTML.delete("\n")
+      <picture>
+      <source srcset="/images/roles/administrator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/administrator.svg" border="0" alt="This user is an administrator" title="This user is an administrator" src="/images/roles/administrator.png" width="20" height="20" />
+      </picture>
+       <picture>
+      <source srcset="/images/roles/moderator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/moderator.svg" border="0" alt="This user is a moderator" title="This user is a moderator" src="/images/roles/moderator.png" width="20" height="20" />
+      </picture>
+    HTML
+    assert_dom_equal expected, icons
   end
 
   def test_role_icons_administrator
@@ -43,14 +81,56 @@ class UserRolesHelperTest < ActionView::TestCase
 
     user = create(:user)
     icons = role_icons(user)
-    assert_dom_equal %( <a confirm="Are you sure you want to grant the role `administrator&#39; to the user `#{user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(user.display_name)}/role/administrator/grant"><picture><source srcset="/images/roles/blank_administrator.svg" type="image/svg+xml" /><img srcset="/images/roles/blank_administrator.svg" border="0" alt="Grant administrator access" title="Grant administrator access" src="/images/roles/blank_administrator.png" width="20" height="20" /></picture></a> <a confirm="Are you sure you want to grant the role `moderator&#39; to the user `#{user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(user.display_name)}/role/moderator/grant"><picture><source srcset="/images/roles/blank_moderator.svg" type="image/svg+xml" /><img srcset="/images/roles/blank_moderator.svg" border="0" alt="Grant moderator access" title="Grant moderator access" src="/images/roles/blank_moderator.png" width="20" height="20" /></picture></a>), icons
+    expected = " " + <<~HTML.delete("\n")
+      <a confirm="Are you sure you want to grant the role `administrator&#39; to the user `#{user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(user.display_name)}/role/administrator/grant">
+      <picture>
+      <source srcset="/images/roles/blank_administrator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/blank_administrator.svg" border="0" alt="Grant administrator access" title="Grant administrator access" src="/images/roles/blank_administrator.png" width="20" height="20" />
+      </picture>
+      </a>
+       <a confirm="Are you sure you want to grant the role `moderator&#39; to the user `#{user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(user.display_name)}/role/moderator/grant">
+      <picture>
+      <source srcset="/images/roles/blank_moderator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/blank_moderator.svg" border="0" alt="Grant moderator access" title="Grant moderator access" src="/images/roles/blank_moderator.png" width="20" height="20" />
+      </picture>
+      </a>
+    HTML
+    assert_dom_equal expected, icons
 
     moderator_user = create(:moderator_user)
     icons = role_icons(moderator_user)
-    assert_dom_equal %( <a confirm="Are you sure you want to grant the role `administrator&#39; to the user `#{moderator_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(moderator_user.display_name)}/role/administrator/grant"><picture><source srcset="/images/roles/blank_administrator.svg" type="image/svg+xml" /><img srcset="/images/roles/blank_administrator.svg" border="0" alt="Grant administrator access" title="Grant administrator access" src="/images/roles/blank_administrator.png" width="20" height="20" /></picture></a> <a confirm="Are you sure you want to revoke the role `moderator&#39; from the user `#{moderator_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(moderator_user.display_name)}/role/moderator/revoke"><picture><source srcset="/images/roles/moderator.svg" type="image/svg+xml" /><img srcset="/images/roles/moderator.svg" border="0" alt="Revoke moderator access" title="Revoke moderator access" src="/images/roles/moderator.png" width="20" height="20" /></picture></a>), icons
+    expected = " " + <<~HTML.delete("\n")
+      <a confirm="Are you sure you want to grant the role `administrator&#39; to the user `#{moderator_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(moderator_user.display_name)}/role/administrator/grant">
+      <picture>
+      <source srcset="/images/roles/blank_administrator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/blank_administrator.svg" border="0" alt="Grant administrator access" title="Grant administrator access" src="/images/roles/blank_administrator.png" width="20" height="20" />
+      </picture>
+      </a>
+       <a confirm="Are you sure you want to revoke the role `moderator&#39; from the user `#{moderator_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(moderator_user.display_name)}/role/moderator/revoke">
+      <picture>
+      <source srcset="/images/roles/moderator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/moderator.svg" border="0" alt="Revoke moderator access" title="Revoke moderator access" src="/images/roles/moderator.png" width="20" height="20" />
+      </picture>
+      </a>
+    HTML
+    assert_dom_equal expected, icons
 
     super_user = create(:super_user)
     icons = role_icons(super_user)
-    assert_dom_equal %( <a confirm="Are you sure you want to revoke the role `administrator&#39; from the user `#{super_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(super_user.display_name)}/role/administrator/revoke"><picture><source srcset="/images/roles/administrator.svg" type="image/svg+xml" /><img srcset="/images/roles/administrator.svg" border="0" alt="Revoke administrator access" title="Revoke administrator access" src="/images/roles/administrator.png" width="20" height="20" /></picture></a> <a confirm="Are you sure you want to revoke the role `moderator&#39; from the user `#{super_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(super_user.display_name)}/role/moderator/revoke"><picture><source srcset="/images/roles/moderator.svg" type="image/svg+xml" /><img srcset="/images/roles/moderator.svg" border="0" alt="Revoke moderator access" title="Revoke moderator access" src="/images/roles/moderator.png" width="20" height="20" /></picture></a>), icons
+    expected = " " + <<~HTML.delete("\n")
+      <a confirm="Are you sure you want to revoke the role `administrator&#39; from the user `#{super_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(super_user.display_name)}/role/administrator/revoke">
+      <picture>
+      <source srcset="/images/roles/administrator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/administrator.svg" border="0" alt="Revoke administrator access" title="Revoke administrator access" src="/images/roles/administrator.png" width="20" height="20" />
+      </picture>
+      </a>
+       <a confirm="Are you sure you want to revoke the role `moderator&#39; from the user `#{super_user.display_name}&#39;?" rel="nofollow" data-method="post" href="/user/#{ERB::Util.u(super_user.display_name)}/role/moderator/revoke">
+      <picture>
+      <source srcset="/images/roles/moderator.svg" type="image/svg+xml" />
+      <img srcset="/images/roles/moderator.svg" border="0" alt="Revoke moderator access" title="Revoke moderator access" src="/images/roles/moderator.png" width="20" height="20" />
+      </picture>
+      </a>
+    HTML
+    assert_dom_equal expected, icons
   end
 end