deprecation version number should say "After version ..." #8073
Description
The docs to misc/misc.py, deprecation() say to put the current version of Sage, but the message that is printed says that the function has been deprecated "Since Sage ". The "since" can be construed as >=, instead of just >. I suggest we change "Since" to "After" to make the meaning more clear.
Component: misc
Reviewer: Volker Braun, Karl-Dieter Crisman
Issue created by migration from https://trac.sagemath.org/ticket/8073