sharper boundaries for @ mentions (fixes #2195)
sharper boundaries for @ mentions (fixes #2195)

clarkerubber/lila,arex1337/lila,clarkerubber/lila,luanlv/lila,clarkerubber/lila,arex1337/lila,luanlv/lila,clarkerubber/lila,arex1337/lila,luanlv/lila,luanlv/lila,clarkerubber/lila,clarkerubber/lila,arex1337/lila,luanlv/lila,luanlv/lila,arex1337/lila,arex1337/lila,arex1337/lila,clarkerubber/lila,luanlv/lila