diff --git a/guides/rails_guides/markdown/renderer.rb b/guides/rails_guides/markdown/renderer.rb
index c8bdd01ea0..c1968af64a 100644
--- a/guides/rails_guides/markdown/renderer.rb
+++ b/guides/rails_guides/markdown/renderer.rb
@@ -23,7 +23,7 @@ HTML
       end
 
       def paragraph(text)
-        if text =~ /^(TIP|IMPORTANT|CAUTION|WARNING|NOTE|INFO|TODO)[.:](.*?)/
+        if text =~ /^(TIP|IMPORTANT|CAUTION|WARNING|NOTE|INFO|TODO)[.:]/
           convert_notes(text)
         elsif text.include?('DO NOT READ THIS FILE IN GITHUB')
         elsif text =~ /^\[<sup>(\d+)\]:<\/sup> (.+)$/