bootstrap, Makefile (bootstrap-clean): Update for versioned environme…

…nt-... files

Makefile

@@ -158,11 +158,7 @@ bootstrap-clean:
 	rm -rf config/install-sh config/compile config/config.guess config/config.sub config/missing configure build/make/Makefile-auto.in
 	rm -f src/doc/en/installation/*.txt
 	rm -rf src/doc/en/reference/spkg/*.rst
-	rm -f environment.yml
-	rm -f src/environment.yml
-	rm -f src/environment-dev.yml
-	rm -f environment-optional.yml
-	rm -f src/environment-optional.yml
+	for a in environment environment-optional src/environment src/environment-dev src/environment-optional; do rm -f $$a.yml $$a-3.[89].yml $$a-3.1[0-9].yml; done
 	rm -f src/Pipfile
 	rm -f src/pyproject.toml
 	rm -f src/requirements.txt

bootstrap

@@ -226,10 +226,10 @@ save () {
 	build/make/Makefile-auto.in \
 	src/doc/en/installation/*.txt \
 	src/doc/en/reference/spkg/*.rst \
-	environment.yml \
-	src/environment.yml \
-	environment-optional.yml \
-	src/environment-optional.yml \
+	environment-3.[89].yml environment-3.1[0-9].yml \
+	src/environment-3.[89].yml src/environment-3.1[0-9].yml \
+	environment-optional-3.[89].yml environment-optional-3.1[0-9].yml \
+	src/environment-optional-3.[89].yml src/environment-optional-3.1[0-9].yml \
 	src/Pipfile \
 	src/pyproject.toml \
 	src/requirements.txt \