#data
FOO<!-- BAR -->BAZ
#errors
(1,3): expected-doctype-but-got-chars
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  BAR  -->
|     "BAZ"

#data
FOO<!-- BAR --!>BAZ
#errors
(1,3): expected-doctype-but-got-chars
(1,15): unexpected-bang-after-double-dash-in-comment
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  BAR  -->
|     "BAZ"

#data
FOO<!-- BAR --   >BAZ
#errors
(1,3): expected-doctype-but-got-chars
(1,15): unexpected-char-in-comment
(1,21): eof-in-comment
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  BAR --   >BAZ -->

#data
FOO<!-- BAR -- <QUX> -- MUX -->BAZ
#errors
(1,3): expected-doctype-but-got-chars
(1,15): unexpected-char-in-comment
(1,24): unexpected-char-in-comment
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  BAR -- <QUX> -- MUX  -->
|     "BAZ"

#data
FOO<!-- BAR -- <QUX> -- MUX --!>BAZ
#errors
(1,3): expected-doctype-but-got-chars
(1,15): unexpected-char-in-comment
(1,24): unexpected-char-in-comment
(1,31): unexpected-bang-after-double-dash-in-comment
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  BAR -- <QUX> -- MUX  -->
|     "BAZ"

#data
FOO<!-- BAR -- <QUX> -- MUX -- >BAZ
#errors
(1,3): expected-doctype-but-got-chars
(1,15): unexpected-char-in-comment
(1,24): unexpected-char-in-comment
(1,31): unexpected-char-in-comment
(1,35): eof-in-comment
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  BAR -- <QUX> -- MUX -- >BAZ -->

#data
FOO<!---->BAZ
#errors
(1,3): expected-doctype-but-got-chars
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  -->
|     "BAZ"

#data
FOO<!--->BAZ
#errors
(1,3): expected-doctype-but-got-chars
(1,9): incorrect-comment
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  -->
|     "BAZ"

#data
FOO<!-->BAZ
#errors
(1,3): expected-doctype-but-got-chars
(1,8): incorrect-comment
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!--  -->
|     "BAZ"

#data
<?xml version="1.0">Hi
#errors
(1,1): expected-tag-name-but-got-question-mark
(1,22): expected-doctype-but-got-chars
#document
| <!-- ?xml version="1.0" -->
| <html>
|   <head>
|   <body>
|     "Hi"

#data
<?xml version="1.0">
#errors
(1,1): expected-tag-name-but-got-question-mark
(1,20): expected-doctype-but-got-eof
#document
| <!-- ?xml version="1.0" -->
| <html>
|   <head>
|   <body>

#data
<?xml version
#errors
(1,1): expected-tag-name-but-got-question-mark
(1,13): expected-doctype-but-got-eof
#document
| <!-- ?xml version -->
| <html>
|   <head>
|   <body>

#data
FOO<!----->BAZ
#errors
(1,3): expected-doctype-but-got-chars
(1,10): unexpected-dash-after-double-dash-in-comment
#document
| <html>
|   <head>
|   <body>
|     "FOO"
|     <!-- - -->
|     "BAZ"

#data
<html><!-- comment --><title>Comment before head</title>
#errors
(1,6): expected-doctype-but-got-start-tag
#document
| <html>
|   <!--  comment  -->
|   <head>
|     <title>
|       "Comment before head"
|   <body>
