[rubygems/rubygems] Adapt failing tests to new output

https://github.com/rubygems/rubygems/commit/cf549e71aa

test/rubygems/test_gem_commands_owner_command.rb

@@ -471,7 +471,7 @@ EOF
 
     access_notice = "The existing key doesn't have access of remove_owner on RubyGems.org. Please sign in to update access."
     assert_match access_notice, @stub_ui.output
-    assert_match "Email:", @stub_ui.output
+    assert_match "Username/email:", @stub_ui.output
     assert_match "Password:", @stub_ui.output
     assert_match "Added remove_owner scope to the existing API key", @stub_ui.output
     assert_match response_success, @stub_ui.output
@@ -495,7 +495,7 @@ EOF
 
     access_notice = "The existing key doesn't have access of add_owner on RubyGems.org. Please sign in to update access."
     assert_match access_notice, @stub_ui.output
-    assert_match "Email:", @stub_ui.output
+    assert_match "Username/email:", @stub_ui.output
     assert_match "Password:", @stub_ui.output
     assert_match "Added add_owner scope to the existing API key", @stub_ui.output
     assert_match response_success, @stub_ui.output

test/rubygems/test_gem_commands_push_command.rb

@@ -547,7 +547,7 @@ class TestGemCommandsPushCommand < Gem::TestCase
     access_notice = "The existing key doesn't have access of push_rubygem on https://rubygems.example. Please sign in to update access."
     assert_match mfa_notice, @ui.output
     assert_match access_notice, @ui.output
-    assert_match "Email:", @ui.output
+    assert_match "Username/email:", @ui.output
     assert_match "Password:", @ui.output
     assert_match "Added push_rubygem scope to the existing API key", @ui.output
     assert_match response_success, @ui.output
@@ -588,7 +588,7 @@ class TestGemCommandsPushCommand < Gem::TestCase
     mfa_notice = "You have enabled multi-factor authentication. Please enter OTP code."
     assert_match mfa_notice, @ui.output
     assert_match "Enter your https://rubygems.example credentials.", @ui.output
-    assert_match "Email:", @ui.output
+    assert_match "Username/email:", @ui.output
     assert_match "Password:", @ui.output
     assert_match "Signed in with API key:", @ui.output
     assert_match response_success, @ui.output

test/rubygems/test_gem_commands_yank_command.rb

@@ -291,7 +291,7 @@ class TestGemCommandsYankCommand < Gem::TestCase
 
     access_notice = "The existing key doesn't have access of yank_rubygem on http://example. Please sign in to update access."
     assert_match access_notice, @ui.output
-    assert_match "Email:", @ui.output
+    assert_match "Username/email:", @ui.output
     assert_match "Password:", @ui.output
     assert_match "Added yank_rubygem scope to the existing API key", @ui.output
     assert_match response_success, @ui.output