Recognize HTMLCloseComment after multiline comment

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index 9f7e889968481f85d03986264ff9bf746b27a342..beb4d094d0ae0b8cea59fba4f3683227ad46c3fd 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -120,6 +120,7 @@ TEST(ScanHTMLEndComments) {
   // whitespace, even a multiline-comment containing a newline).
   // This was not the case if it occurred before the first real token
   // in the input.
+  // clang-format off
   const char* tests[] = {
       // Before first real token.
       "--> is eol-comment\nvar y = 37;\n",
@@ -129,6 +130,8 @@ TEST(ScanHTMLEndComments) {
       // After first real token.
       "var x = 42;\n--> is eol-comment\nvar y = 37;\n",
       "var x = 42;\n/* precomment */ --> is eol-comment\nvar y = 37;\n",
+      "x/* precomment\n */ --> is eol-comment\nvar y = 37;\n",
+      "var x = 42; /* precomment\n */ --> is eol-comment\nvar y = 37;\n",

[nickie, 2016/07/04 08:27:10]

According to the spec [1], the end of a real multi-line comment
(MultiLineComment) can be followed by an optional HTMLCloseComment.  This can
start with a sequence of not only white space, but also 
single line delimited comments (SingleLineDelimitedComment), i.e., comments of
the form /* no line terminator here */.

I am not sure if we handle this case correctly.  In any case, we should have
tests for this.  E.g.

"/* MLC \n */ /* SLDC */ --> is eol-comment\nvar y = 37;\n",
"/* MLC \n */ /* SLDC1 */ /* SLDC2 */ --> is eol-comment\nvar y = 37;\n",
"/* MLC1 \n */ /* MLC2 \n */ --> is eol-comment\nvar y = 37;\n",
"/* SLDC */ /* MLC \n */ --> is eol-comment\nvar y = 37;\n",
"/* MLC1 \n */ /* SLDC1 */ /* MLC2 \n */ /* SLDC2 */ --> is eol-comment\nvar y =
37;\n",

Also, we should possibly have tests without spaces in between the comments or
around "-->".

[1] https://tc39.github.io/ecma262/#sec-html-like-comments

       NULL
   };
 
@@ -136,11 +139,10 @@ TEST(ScanHTMLEndComments) {
       "x --> is eol-comment\nvar y = 37;\n",
       "\"\\n\" --> is eol-comment\nvar y = 37;\n",
       "x/* precomment */ --> is eol-comment\nvar y = 37;\n",
-      "x/* precomment\n */ --> is eol-comment\nvar y = 37;\n",
       "var x = 42; --> is eol-comment\nvar y = 37;\n",
-      "var x = 42; /* precomment\n */ --> is eol-comment\nvar y = 37;\n",
       NULL
   };
+  // clang-format on
 
   // Parser/Scanner needs a stack limit.
   CcTest::i_isolate()->stack_guard()->SetStackLimit(