Merge branch 'ssrfun' into 'master'

Make x.1, x.2 notation compatible with ssrfun.

See merge request robbertkrebbers/coq-stdpp!21
5 jobs for master in 4 minutes and 41 seconds
Status Job ID Name Coverage
  Build
passed #6065
fp-timing
build-coq.8.6.1

00:02:06

passed #6064
fp-timing
build-coq.8.7.0

00:02:03

 
  Deploy
passed #6066
opam

00:00:13

 
  Build More
passed #6068
fp-timing
build-coq.8.6

00:02:08

passed #6067
fp-timing
build-coq.8.7.dev

00:02:19