[MD settings] use regex to replace all nbsp

chrome/test/data/webui/i18n_behavior_test.html

Index: chrome/test/data/webui/i18n_behavior_test.html
diff --git a/chrome/test/data/webui/i18n_behavior_test.html b/chrome/test/data/webui/i18n_behavior_test.html
index 7a3a6ca4b0257398b06248d1a1feb808dc1bba0f..8e59dead3263bbbaff5a5f6b253ec7e9b97694a1 100644
--- a/chrome/test/data/webui/i18n_behavior_test.html
+++ b/chrome/test/data/webui/i18n_behavior_test.html
@@ -7,7 +7,7 @@
 
 var allowedByDefault = '<a href="https://google.com">Google!</a>';
 var text = 'I\'m just text, nobody should have a problem with me!';
-var nonBreakingSpace = 'A\u00a0B';  // 0xa0 is a unicode nbsp.
+var nonBreakingSpace = 'A\u00a0B\u00a0C';  // \u00a0 is a unicode nbsp.
 
 function setUpPage() {
   loadTimeData.data = {