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

expectations/gm/ignored-tests.txt

-# 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.
 #
 # The idea is that, if you modify a GM test in such a way that you know it will
 # require rebaselines on multiple platforms, you should add that test's name to
 # this list within the same CL that modifies the test.
 # Then, AS SOON AS POSSIBLE, you should rebaseline the tests (they will show up
 # as status "failure-ignored") and remove the line you added to this file.
 # 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.
 #
 # For more information, see https://code.google.com/p/skia/issues/detail?id=1600
 # ('GM expectations: create tool to suppress failures until new baselines are
 # checked in')
 #
 #
 # [1] Differences between renderModes (e.g., normal rendering path and
 # "serialized") are NEVER ignored.  See
 # https://code.google.com/p/skia/issues/detail?id=1748 ('gm: add new result
 # type, RenderModeMismatch')
 
 # 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
 blurrects
 simpleblurroundrect
 
 # Added by sugoi for added test in https://codereview.chromium.org/104853005
 displacement
 
 # Added by zheng.xu as part of https://codereview.chromium.org/105893003
 # blur related GM results need rebaslining
 imageblur
 imagefiltersbase
 imagefilterscropped
 imagefiltersgraph
 spritebitmap
 testimagefilters