Issue #15759: "make suspicious", "make linkcheck" and "make doctest" in Doc/

now display special message when and only when there are failures.

diff --cc Misc/NEWS
index 6b16b644eb5e4b036c98c6847bcacf4737d1a1db,2a6f24f23918759f756292630cede6b5255aff1e..e542d50ac826ea7c3d8631fbf66fc3ca4d249dda
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -635,18 -535,7 +635,21 @@@ IDL
  Build
  -----
  
 -- The Windows build now includes OpenSSL 1.0.1g
++- Issue #15759: "make suspicious", "make linkcheck" and "make doctest" in Doc/
++  now display special message when and only when there are failures.
++
 +- Issue #21141: The Windows build process no longer attempts to find Perl,
 +  instead relying on OpenSSL source being configured and ready to build.  The
 +  ``PCbuild\build_ssl.py`` script has been re-written and re-named to
 +  ``PCbuild\prepare_ssl.py``, and takes care of configuring OpenSSL source
 +  for both 32 and 64 bit platforms.  OpenSSL sources obtained from
 +  svn.python.org will always be pre-configured and ready to build.
 +
 +- Issue #21037: Add a build option to enable AddressSanitizer support.
 +
 +- Issue #19962: The Windows build process now creates "python.bat" in the
 +  root of the source tree, which passes all arguments through to the most
 +  recently built interpreter.
  
  - Issue #21285: Refactor and fix curses configure check to always search
    in a ncursesw directory.