Fix typo in coverage_report.py.

BUG=pdfium:1174

Change-Id: I4ade5c52f505690d14683cb094cc13c6fd9441f4
Reviewed-on: https://pdfium-review.googlesource.com/c/44173
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

testing/tools/coverage/coverage_report.py

diff --git a/testing/tools/coverage/coverage_report.py b/testing/tools/coverage/coverage_report.py
index db8d75a..76a6a61 100755
--- a/testing/tools/coverage/coverage_report.py
+++ b/testing/tools/coverage/coverage_report.py
@@ -236,7 +236,7 @@
     coverage_args += ['-f', 'xfa']
 
     # Blacklist test files
-    coverage_args += ['-i', '.*test*.']
+    coverage_args += ['-i', '.*test.*']
 
     return self.call([coverage_bin] + coverage_args) == 0