Merge 2019-07 LWG Motion 10

P1466R3 Miscellaneous minor fixes for chrono

Fixes #3014.

Author: zygoloid

source/support.tex

@@ -569,7 +569,7 @@
   \tcode{<atomic>} \tcode{<filesystem>} \tcode{<istream>} \tcode{<limits>}
   \tcode{<locale>} \tcode{<ostream>} \tcode{<string>} \tcode{<string_view>}
   \\ \rowsep
-\defnlibxname{cpp_lib_chrono}                               & \tcode{201611L} &
+\defnlibxname{cpp_lib_chrono}                               & \tcode{201907L} &
   \tcode{<chrono>} \\ \rowsep
 \defnlibxname{cpp_lib_chrono_udls}                          & \tcode{201304L} &
   \tcode{<chrono>} \\ \rowsep