Replace Google+ link with an archived version

Google+ is gone, and so is the original link.

Author: asmeurer

src/faq.rst

@@ -253,7 +253,7 @@ http://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF
 
 The author of Python, Guido van Rossum, has provided motivation behind the
 Python convention here (2013):
-https://plus.google.com/u/0/115212051037621986145/posts/YTUxbXYZyfi
+https://web.archive.org/web/20190321101606/https://plus.google.com/115212051037621986145/posts/YTUxbXYZyfi
 
 Does Fortran support closures?
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