Copy cgi.escape() to html

Lib/cgi.py

Index: Lib/cgi.py
===================================================================
--- Lib/cgi.py	(revision 84355)
+++ Lib/cgi.py	(working copy)
@@ -38,6 +38,7 @@
 import urllib.parse
 import email.parser
 from warnings import warn
+import html
 
 __all__ = ["MiniFieldStorage", "FieldStorage",
            "parse", "parse_qs", "parse_qsl", "parse_multipart",
@@ -899,15 +900,10 @@
 # =========
 
 def escape(s, quote=None):
-    '''Replace special characters "&", "<" and ">" to HTML-safe sequences.
-    If the optional flag quote is true, the quotation mark character (")
-    is also translated.'''
-    s = s.replace("&", "&amp;") # Must be done first!
-    s = s.replace("<", "&lt;")
-    s = s.replace(">", "&gt;")
-    if quote:
-        s = s.replace('"', "&quot;")
-    return s
+    """Deprecated API."""
+    warn("cgi.escape is deprecated, use html.escape instead",
+         PendingDeprecationWarning)
+    return html.escape(s, quote)
 
 def valid_boundary(s, _vb_pattern="^[ -~]{0,200}[!-~]$"):
     import re