Release notes update

Author: davidpeckham

messages/3.0.0.md

@@ -14,7 +14,7 @@ Changes
 - Now uses Perl regular expression syntax instead of Python regular expression syntax
 - Now you can show source line numbers (see the new line_numbers preference, off by default)
 - Now always filters to a new buffer (no longer supports filtering in place)
-- No longer supports custom separators
+- No longer supports custom line separators
 - Refactored commands to make this plugin easier for others to extend
 
 Regular Expression Syntax