Adjust "repo:<version>" text ordering to more explicitly recommend "-suite" variants

.template-helpers/variant-default-debian.md

@@ -1 +1 @@
-Some of these tags may have names like %%DEB-SUITES%% in them. These are the suite code names for releases of [Debian](https://wiki.debian.org/DebianReleases) and indicate which release the image is based on.
+Some of these tags may have names like %%DEB-SUITES%% in them. These are the suite code names for releases of [Debian](https://wiki.debian.org/DebianReleases) and indicate which release the image is based on. If your image needs to install any additional packages beyond what comes with the image, you'll likely want to specify one of these explicitly to minimize breakage when there are new releases of Debian.

.template-helpers/variant-default-ubuntu.md

@@ -1 +1 @@
-Some of these tags may have names like %%DEB-SUITES%% in them. These are the suite code names for releases of [Ubuntu](https://wiki.ubuntu.com/Releases) and indicate which release the image is based on.
+Some of these tags may have names like %%DEB-SUITES%% in them. These are the suite code names for releases of [Ubuntu](https://wiki.ubuntu.com/Releases) and indicate which release the image is based on. If your image needs to install any additional packages beyond what comes with the image, you'll likely want to specify one of these explicitly to minimize breakage when there are new releases of Ubuntu.

.template-helpers/variant.sh

@@ -20,7 +20,8 @@ join() {
 
 commaJoin() {
 	local items=( $(xargs -n1 <<<"$1" | sort -u) ); shift
-	sep=', '
+
+	local sep=', '
 	case "${#items[@]}" in
 		0)
 			return
@@ -100,21 +101,6 @@ if [ -n "$text" ]; then
 	default="$([ -f "$repoDir/variant.md" ] && cat "$repoDir/variant.md" || cat "$dir/variant.md")"
 	default+=$'\n' # parameter expansion eats the trailing newline
 
-	# buildpack-deps text
-	potentialTags="$(bashbrew list --uniq "$bbRepo" | cut -d: -f2)"
-	for tag in $potentialTags; do
-		baseImage="$(bashbrew cat -f '{{ .ArchLastStageFrom (.TagEntry.Architectures | first) .TagEntry }}' "$bbRepo:$tag" 2>/dev/null)"
-		case "$baseImage" in
-			buildpack-deps:*-*) ;; # "scm", "curl" -- not large images
-			buildpack-deps:*)
-				default+=$'\n' # give a little space
-				default+="$(< "$dir/variant-default-buildpack-deps.md")"
-				default+=$'\n' # parameter expansion eats the trailing newline
-				break
-				;;
-		esac
-	done
-
 	if [ "$repo" != 'debian' ] && [ "$repo" != 'ubuntu' ]; then
 		# what is 'jessie', 'stretch' and 'sid'
 		# https://github.com/docker-library/python/issues/343
@@ -151,6 +137,21 @@ if [ -n "$text" ]; then
 		fi
 	fi
 
+	# buildpack-deps text
+	potentialTags="$(bashbrew list --uniq "$bbRepo" | cut -d: -f2)"
+	for tag in $potentialTags; do
+		baseImage="$(bashbrew cat -f '{{ .ArchLastStageFrom (.TagEntry.Architectures | first) .TagEntry }}' "$bbRepo:$tag" 2>/dev/null)"
+		case "$baseImage" in
+			buildpack-deps:*-*) ;; # "scm", "curl" -- not large images
+			buildpack-deps:*)
+				default+=$'\n' # give a little space
+				default+="$(< "$dir/variant-default-buildpack-deps.md")"
+				default+=$'\n' # parameter expansion eats the trailing newline
+				break
+				;;
+		esac
+	done
+
 	echo
 	echo