[data-icon='test-1']:before { content: '\\'; }

[data-icon='test-2']:before { content: '\''; }

[data-icon='test-3']:before { content: "\""; }

[data-icon='test-4']:before { content: '\\'; }

[data-icon='test-5']:before { content: '\''; }

[data-icon='test-6']:before { content: "\""; }

.\E9motion { blah: hi; }

.\E9 dition { blah: hi; }

.\0000E9dition { blah: hi; }