diff --git a/docs/memories/gf_routing_and_carriers.md b/docs/memories/gf_routing_and_carriers.md
index 35137885..81280fd5 100644
--- a/docs/memories/gf_routing_and_carriers.md
+++ b/docs/memories/gf_routing_and_carriers.md
@@ -325,5 +325,6 @@ naming each code by Matrix's `shortName`. Both go through
 `_print_carrier_legend_line`, which collapses the whitespace runs of an entry, a
 newline and a tab included, to one space, so a name cannot break the legend over
 two lines. When the legend outgrows the console it breaks only between entries,
-never between a code and its name; Rich breaks at any space, a no-break space
-included, so `_print_carrier_legend_line` picks the break itself.
+never between a code and its name, unless one entry is wider than the console;
+Rich then folds that entry. Rich breaks at any space, a no-break space included,
+so `_print_carrier_legend_line` picks the break itself.
diff --git a/tests/test_carrier_legend_docs.py b/tests/test_carrier_legend_docs.py
index 348790da..3a17a0cd 100644
--- a/tests/test_carrier_legend_docs.py
+++ b/tests/test_carrier_legend_docs.py
@@ -21,6 +21,18 @@ def test_memo_says_a_wrapped_legend_breaks_only_between_entries() -> None:
     memo = " ".join(text.split())
     assert (
         "When the legend outgrows the console it breaks only between entries, never between a "
-        "code and its name; Rich breaks at any space, a no-break space included, so "
+        "code and its name, unless one entry is wider than the console; Rich then folds that "
+        "entry. Rich breaks at any space, a no-break space included, so "
+        "`_print_carrier_legend_line` picks the break itself."
+    ) in memo
+
+
+def test_memo_says_an_entry_wider_than_the_console_is_folded() -> None:
+    text = (_ROOT / "docs/memories/gf_routing_and_carriers.md").read_text()
+    memo = " ".join(text.split())
+    assert (
+        "When the legend outgrows the console it breaks only between entries, never between a "
+        "code and its name, unless one entry is wider than the console; Rich then folds that "
+        "entry. Rich breaks at any space, a no-break space included, so "
         "`_print_carrier_legend_line` picks the break itself."
     ) in memo