Add knob disabling comma ending heuristic
diff --git a/README.rst b/README.rst
index 120acac..19ef0c2 100644
--- a/README.rst
+++ b/README.rst
@@ -415,6 +415,10 @@
             end_ts=now(),
         )  # <--- this bracket is dedented and on a separate line
 
+``DISABLE_ENDING_COMMA_HEURISTIC``
+    Disable the heuristic which places each list element on a separate line if
+    the list is comma-terminated.
+
 ``EACH_DICT_ENTRY_ON_SEPARATE_LINE``
     Place each dictionary entry onto its own line.