Change semantics of empty list equality

I considered making empty lists of undetermined type equal to all empty
lists, but then the comparison would not be transitive

1 files changed, 2 insertions, 2 deletions

diff --git a/include/tag_list.h b/include/tag_list.h
index af5a87d5ee..adb8623f45 100644
--- a/include/tag_list.h
+++ b/include/tag_list.h
@@ -161,8 +161,8 @@ public:
     /**
      * @brief Equality comparison for lists
      *
-     * Lists are considered equal if they contain equal tags. Empty lists
-     * are always considered equal to each other.
+     * Lists are considered equal if their content types and the contained tags
+     * are equal.
      */
     friend bool operator==(const tag_list& lhs, const tag_list& rhs);
     friend bool operator!=(const tag_list& lhs, const tag_list& rhs);