diff --git a/doc/string.rb b/doc/string.rb
index ad1abf29b7..9ed97d49f6 100644
--- a/doc/string.rb
+++ b/doc/string.rb
@@ -334,7 +334,7 @@
 # _Counts_
 #
 # - #length (aliased as #size): Returns the count of characters (not bytes).
-# - #empty?: Returns +true+ if +self.length+ is zero; +false+ otherwise.
+# - #empty?: Returns whether the length of +self+ is zero.
 # - #bytesize: Returns the count of bytes.
 # - #count: Returns the count of substrings matching given strings.
 #
diff --git a/string.c b/string.c
index bd0496f6da..5db6d2e676 100644
--- a/string.c
+++ b/string.c
@@ -2417,12 +2417,13 @@ rb_str_bytesize(VALUE str)
  *  call-seq:
  *    empty? -> true or false
  *
- *  Returns +true+ if the length of +self+ is zero, +false+ otherwise:
+ *  Returns whether the length of +self+ is zero:
  *
- *    "hello".empty? # => false
- *    " ".empty? # => false
- *    "".empty? # => true
+ *    'hello'.empty? # => false
+ *    ' '.empty? # => false
+ *    ''.empty? # => true
  *
+ *  Related: see {Querying}[rdoc-ref:String@Querying].
  */
 
 static VALUE