Fix some minor issues in bashbrew.sh

Double quotes and indented heredocs!

bashbrew.sh

@@ -19,17 +19,17 @@ logs="$(readlink -f "$logs")"
 self="$(basename "$0")"
 
 usage() {
-	cat <<EOUSAGE
+	cat <<-EOUSAGE
 		
-usage: $self [build|push|list] [options] [repo[:tag] ...]
+		usage: $self [build|push|list] [options] [repo[:tag] ...]
 		   ie: $self build --all
 		       $self push debian ubuntu:12.04
 		       $self list --namespaces='_' debian:7 hello-world
 		
-This script processes the specified Docker images using the corresponding
-repository manifest files.
+		This script processes the specified Docker images using the corresponding
+		repository manifest files.
 		
-common options:
+		common options:
 		  --all              Build all repositories specified in library
 		  --docker="$docker"
 		                     Use a custom Docker binary
@@ -50,16 +50,16 @@ common options:
 		                     images to use FROM correctly (think "onbuild" variants that
 		                     are "FROM base-image:some-version")
 		
-build options:
+		build options:
 		  --no-build         Don't build, print what would build
 		  --no-clone         Don't pull/clone Git repositories
 		  --src="$src"
 		                     Where to store cloned Git repositories (GOPATH style)
 		
-push options:
+		push options:
 		  --no-push          Don't push, print what would push
 		
-EOUSAGE
+	EOUSAGE
 }
 
 # arg handling
@@ -71,7 +71,7 @@ doBuild=1
 doPush=1
 buildAll=
 while true; do
-	flag=$1
+	flag="$1"
 	shift
 	case "$flag" in
 		--all) buildAll=1 ;;
@@ -97,10 +97,9 @@ done
 
 # which subcommand
 subcommand="$1"
+shift || { usage >&2 && exit 1; }
 case "$subcommand" in
-	build|push|list)
-		shift
-		;;
+	build|push|list) ;;
 	*)
 		{
 			echo "error: unknown subcommand: $1"