Accept only EOL comments as Kotlin expectation comments

Author: atorralba

java/ql/lib/semmle/code/java/Javadoc.qll

@@ -153,6 +153,15 @@ class KtComment extends Top, @ktcomment {
   /** Gets the full text of this comment. */
   string getText() { ktComments(this, _, result) }
 
+  /** Holds if this comment is an EOL comment. */
+  predicate isEolComment() { ktComments(this, 1, _) }
+
+  /** Holds if this comment is a block comment. */
+  predicate isBlockComment() { ktComments(this, 2, _) }
+
+  /** Holds if this comment is a KDoc comment. */
+  predicate isDocComment() { ktComments(this, 3, _) }
+
   /** Gets the sections of this comment. */
   KtCommentSection getSections() { ktCommentSections(result, this, _) }
 

java/ql/test/TestUtilities/InlineExpectationsTestPrivate.qll

@@ -16,7 +16,7 @@ private class JavadocExpectationComment extends Javadoc, ExpectationComment {
 }
 
 private class KtExpectationComment extends KtComment, ExpectationComment {
-  override string getContents() {
-    result = this.getText().regexpCapture("(?://|/\\*)(.*)(?:\\*/)?", 1)
-  }
+  KtExpectationComment() { this.isEolComment() }
+
+  override string getContents() { result = this.getText().suffix(2).trim() }
 }