lib/kramdown/parser/kramdown/emphasis.rb in kramdown-2.1.0 vs lib/kramdown/parser/kramdown/emphasis.rb in kramdown-2.2.0

@@ -20,10 +20,10 @@
 
         result = @src.scan(EMPHASIS_START)
         element = (result.length == 2 ? :strong : :em)
         type = result[0..0]
 
-        if (type == '_' && @src.pre_match =~ /[[:alpha:]-]\z/) || @src.check(/\s/) ||
+        if (type == '_' && @src.pre_match =~ /[[:alpha:]]-?[[:alpha:]]*\z/) || @src.check(/\s/) ||
             @tree.type == element || @stack.any? {|el, _| el.type == element }
           add_text(result)
           return
         end