Merge branch 'gh172' of https://github.com/latex3/latex2e into gh172

do the tlmgr --self update always after all

support/texlive.sh

@@ -17,11 +17,14 @@ if ! command -v texlua > /dev/null; then
   ./install-tl --profile=../support/texlive.profile
 
   cd ..
-else
-  # Update a cached version first (else later step might fail)
-  tlmgr update --self
 fi
 
+# Backups only make the cache bigger
+tlmgr option -- autobackup 0
+
+# Update a cached version first (else later step might fail)
+tlmgr update --self
+
 # Needed for any use of texlua even if not testing LuaTeX
 tlmgr install luatex
 
@@ -80,9 +83,3 @@ tlmgr install  \
   wasy         \
   wsuipa       \
   xkeyval
-
-# Keep no backups (not required, simply makes cache bigger)
-tlmgr option -- autobackup 0
-
-# Update the TL install but add nothing new
-tlmgr update --all --no-auto-install