Mastodon: Erase spaces surrounding user handle on Firefox

[weavermarquez]

Using Firefox 58.0.2 (64-bit) on Windows 10 Pro.

When I triple-click or select by dragging across two lines on a user's user-handle on their page, the resulting copied text has two spaces surrounding the string: one preceding, one succeeding. This can be a flow issue when attempting to follow somebody by copy-pasting a user's full handle into your desired instance account instead of remote-following.

Duplication:

1. Head to: https://mastodon.social/@Gargron
2. triple-click on or select @[email protected]
3. Ctrl-C, Ctrl-V on some text space
4. The resulting string has extraneous whitespace.

Additional notes:
If I triple-click on the user handle on the full profile page, the resulting string has a space before and after the handle.
If I select using this motion in either direction to select the user-handle, the resulting string only has a space after the handle.

If I triple-click on the user handle on the in-web-client profile, the resulting string only has a space after the handle.
If I select using the same motion as above on the in-web-client profile, the resulting string only has a space after the handle.

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• [x ] I searched or browsed the repo’s other issues to ensure this is not a duplicate.

[weavermarquez]

Additional note: The user search does not work if there is only a space after the handle.
i.e., searching "@[email protected] " then pressing enter results in 0 results.