make ignored-tests.txt specify full test name, not partial name

expectations/gm/ignored-tests.txt

Index: expectations/gm/ignored-tests.txt
diff --git a/expectations/gm/ignored-tests.txt b/expectations/gm/ignored-tests.txt
index 44702c7089869307e19f4558e6477711b222075b..c318641b00b77f3a189c5ddeb08786055606666b 100644
--- a/expectations/gm/ignored-tests.txt
+++ b/expectations/gm/ignored-tests.txt
@@ -1,4 +1,4 @@
-# Failures of any GM tests/configs listed in this file will be ignored [1], as
+# Failures of any GM tests listed in this file will be ignored [1], as
 # if they had been marked "ignore-failure": true in the per-builder
 # expected-results.json files.
 #
@@ -10,6 +10,9 @@
 # If there are any lingering failures that need to be suppressed (ignored), you
 # MUST move those suppressions into the per-builder expected-results.json files.
 #
+# The test name must match exactly (no partial string matches).
+# See http://skbug.com/2022
+#
 # Any lines starting with '#' are comments and will be ignored.
 # Other than that, each line must either be whitespace or list just one test.
 #
@@ -25,13 +28,10 @@
 
 # EXAMPLES: (remove the first '#' on each line)
 #
-## Added by edisonn as part of https://codereview.chromium.org/23851037/
-#gradients
-#
 ## Added by epoger as part of MADE-UP BUG
 ## https://code.google.com/p/skia/issues/detail?id=123456 : ignoring failures on
-## gpu config of gradtext GM test
-#gradtext_gpu
+## gradtext GM test
+#gradtext
 
 # Added for skbug.com/1998 by bsalomon. Will require rebaselining when changes are complete.
 bleed