2 files changed, 4 insertions, 0 deletions
diff --git a/Misc/ACKS b/Misc/ACKS
index 65d1adb..4173917 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1255,6 +1255,7 @@ Joel Stanley
 Anthony Starks
 Oliver Steele
 Greg Stein
+Marek Stepniowski
 Baruch Sterin
 Chris Stern
 Alex Stewart
diff --git a/Misc/NEWS b/Misc/NEWS
index 5edfb04..804f1ae 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -39,6 +39,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #12220: mindom now raises a custom ValueError indicating it doesn't
+  support spaces in URIs instead of letting a 'split' ValueError bubble up.
+
 - Issue #21239: patch.stopall() didn't work deterministically when the same
   name was patched more than once.