plugin/git-subrepo: `shellcheck`

clean_files.txt

@@ -89,6 +89,7 @@ plugins/available/blesh.plugin.bash
 plugins/available/cmd-returned-notify.plugin.bash
 plugins/available/direnv.plugin.bash
 plugins/available/docker-machine.plugin.bash
+plugins/available/git-subrepo.plugin.bash
 plugins/available/git.plugin.bash
 plugins/available/go.plugin.bash
 plugins/available/goenv.plugin.bash

plugins/available/git-subrepo.plugin.bash

@@ -1,6 +1,7 @@
-# Load git-subrepo if you are using it, and initialize completions
-
-cite about-plugin
+# shellcheck shell=bash
 about-plugin 'load git-subrepo if you are using it, and initialize completions'
 
-[[ -e "${GIT_SUBREPO_ROOT:=$HOME/.git-subrepo}/init" ]] && source "$GIT_SUBREPO_ROOT/init"
+if [[ -s "${GIT_SUBREPO_ROOT:=$HOME/.git-subrepo}/init" ]]; then
+	# shellcheck disable=SC1091
+	source "$GIT_SUBREPO_ROOT/init"
+fi