safe delete: more precise check for top level comments (IDEA-105923)

java/java-tests/testData/refactoring/safeDelete/topLevelDocComment/after/foo/I.java

@@ -0,0 +1,3 @@
+package foo;
+public interface I {
+}

java/java-tests/testData/refactoring/safeDelete/topLevelDocComment/before/foo/C1.java

@@ -0,0 +1,8 @@
+/**
+ * C1.java - Safe-delete bug example
+ */
+package foo;
+
+public class C1 {
+  C<caret>1 fooo;
+}

java/java-tests/testData/refactoring/safeDelete/topLevelDocComment/before/foo/I.java

@@ -0,0 +1,3 @@
+package foo;
+public interface I {
+}