Don't print clock updates between prints.

CHANGELOG.md

Index: CHANGELOG.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6deb90974eccac6ac6fdc48f6ea06dce827423a2..6f6927771dda54bb9a036e3db84c0255067a5fe9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,4 @@
-## 0.12.3+9
-
-* Widen the constraint on `analyzer` to include `0.26.0`.
-
-## 0.12.3+8
+## 0.12.4
 
 * Add a `--pause-after-load` flag that pauses the test runner after each suite
   is loaded so that breakpoints and other debugging annotations can be added.
@@ -13,6 +9,13 @@
 * The `dart-vm` platform selector variable is now `true` for Dartium and content
   shell.
 
+* The compact reporter no longer prints status lines that only update the clock
+  if they would get in the way of messages or errors from a test.
+
+## 0.12.3+9
+
+* Widen the constraint on `analyzer` to include `0.26.0`.
+
 ## 0.12.3+8
 
 * Fix an uncaught error that could crop up when killing the test runner process