Add more possessive quantifiers, unicode flag and support for more post-heredoc syntax, fix test file syntax being invalid

src/Composer/Autoload/ClassMapGenerator.php

@@ -248,19 +248,19 @@ class ClassMapGenerator
         // strip heredocs/nowdocs
         $contents = preg_replace('{
             # opening heredoc/nowdoc delimiter (word-chars)
-            <<<[ \t]*([\'"]?)(\w+)\\1
+            <<<[ \t]*+([\'"]?)(\w++)\\1
             # needs to be followed by a newline
             (?:\r\n|\n|\r)
             # the meat of it, matching line by line until end delimiter
             (?:
                 # a valid line is optional white-space (possessive match) not followed by the end delimiter, then anything goes for the rest of the line
-                [\t ]*+(?!\\2 [\t \r\n]*[;,.)])[^\r\n]*
+                [\t ]*+(?!\\2 \b)[^\r\n]*+
                 # end of line(s)
-                [\r\n]+
+                [\r\n]++
             )*
             # end delimiter
-            [\t ]* \\2 (?=[\t \r\n]*[;,.)])
+            [\t ]*+ \\2 (?=\b)
-        }x', 'null', $contents);
+        }xu', 'null', $contents);
 
         // strip strings
         $contents = preg_replace('{"[^"\\\\]*+(\\\\.[^"\\\\]*+)*+"|\'[^\'\\\\]*+(\\\\.[^\'\\\\]*+)*+\'}s', 'null', $contents);

tests/Composer/Test/Autoload/Fixtures/classmap/StripNoise.php

@@ -23,7 +23,7 @@ class FailHeredocMarkerInText
 {
 }
 But, what are you blind McFly, it's there. How else do you explain that wreck out there? Doc, Doc. Oh, no. You're alive. Bullet proof vest, how did you know, I never got a chance to tell you. About all that talk about screwing up future events, the space time continuum. Okay, alright, I'll prove it to you.
-    MARKERINTEXT
+  .    MARKERINTEXT
 class FailHeredocMarkerInText2
 {
 }
@@ -95,6 +95,33 @@ NOWDOCTABBED . <<<'NOWDOCPHP73'
     {
         return 'class FailSimpleString {}';
     }
+
+    public function test_unicode_heredoc()
+    {
+        return array(1, 2, <<<öéçив必
+            class FailUnicode
+            {
+            }
+            öéçив必, 3, 4);
+    }
+
+    public function test_wrapped_in_curly_brackets()
+    {
+        return ${<<<FOO
+            class FailCurlyBrackets
+            {
+            }
+            FOO};
+    }
+
+    public function test_wrapped_in_angle_brackets()
+    {
+        return [<<<FOO
+            class FailAngleBrackets
+            {
+            }
+            FOO];
+    }
 }
 
 // Issue #10067.