Isolate the usernames from the surrounding text-direction settings:
The <bdi> tag is currently supported only in Firefox and Chrome.
bdi stands for Bi-directional Isolation.
The <bdi> tag isolates a part of text that might be formatted in a different direction from other text outside it.
This element is useful when embedding user-generated content with an unknown directionality.
The <bdi> tag is new in HTML5.
The <bdi> tag also supports the Global Attributes in HTML.
The <bdi> tag also supports the Event Attributes in HTML.
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