Fix issue parsing php files with unterminated comments found inside backticks, fixes #10385

src/Composer/Autoload/PhpFileCleaner.php

@@ -120,6 +120,7 @@ class PhpFileCleaner
                     }
                     if ($this->peek('*')) {
                         $this->skipComment();
+                        continue;
                     }
                 }
 

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

@@ -4,3 +4,5 @@ namespace Foo\Bar;
 
 class A {}
 class B {}
+
+$x = `/** unterminated comment`;