diff --git a/Doc/library/textwrap.rst b/Doc/library/textwrap.rst
index 094e458..a50600e 100644
--- a/Doc/library/textwrap.rst
+++ b/Doc/library/textwrap.rst
@@ -26,6 +26,9 @@
    Optional keyword arguments correspond to the instance attributes of
    :class:`TextWrapper`, documented below.  *width* defaults to ``70``.
 
+   See the :meth:`TextWrapper.wrap` method for additional details on how
+   :func:`wrap` behaves.
+
 
 .. function:: fill(text[, width[, ...]])
 
@@ -134,9 +137,11 @@
 
    .. attribute:: drop_whitespace
 
-      (default: ``True``) If true, whitespace that, after wrapping, happens to
-      end up at the beginning or end of a line is dropped (leading whitespace in
-      the first line is always preserved, though).
+      (default: ``True``) If true, whitespace at the beginning and ending of
+      every line (after wrapping but before indenting) is dropped.
+      Whitespace at the beginning of the paragraph, however, is not dropped
+      if non-whitespace follows it.  If whitespace being dropped takes up an
+      entire line, the whole line is dropped.
 
       .. versionadded:: 2.6
          Whitespace was always dropped in earlier versions.
@@ -145,7 +150,8 @@
    .. attribute:: initial_indent
 
       (default: ``''``) String that will be prepended to the first line of
-      wrapped output.  Counts towards the length of the first line.
+      wrapped output.  Counts towards the length of the first line.  The empty
+      string is not indented.
 
 
    .. attribute:: subsequent_indent
@@ -208,8 +214,9 @@
 
       Wraps the single paragraph in *text* (a string) so every line is at most
       :attr:`width` characters long.  All wrapping options are taken from
-      instance attributes of the :class:`TextWrapper` instance. Returns a list
-      of output lines, without final newlines.
+      instance attributes of the :class:`TextWrapper` instance.  Returns a list
+      of output lines, without final newlines.  If the wrapped output has no
+      content, the returned list is empty.
 
 
    .. method:: fill(text)