Fix rendering emoji inside a string

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/banzai/filter/emoji_filter.rb b/lib/banzai/filter/emoji_filter.rb
index d6138816e70..6255a611dbe 100644
--- a/lib/banzai/filter/emoji_filter.rb
+++ b/lib/banzai/filter/emoji_filter.rb
@@ -53,7 +53,10 @@ module Banzai
 
       # Build a regexp that matches all valid :emoji: names.
       def self.emoji_pattern
-        @emoji_pattern ||= /:(#{Gitlab::Emoji.emojis_names.map { |name| Regexp.escape(name) }.join('|')}):/
+        @emoji_pattern ||=
+          /(?<=[^[:alnum:]:]|\n|^)
+          :(#{Gitlab::Emoji.emojis_names.map { |name| Regexp.escape(name) }.join('|')}):
+          (?=[^[:alnum:]:]|$)/x
       end
 
       # Build a regexp that matches all valid unicode emojis names.