git-helper: fix bad clearing of lines

commands/git-helper

@@ -486,12 +486,12 @@ function git_helper() (
 
 	function git_update {
 		# verify path, assumed verified for other actions
-		local body=''
-		body="$(mktemp)"
-		if ! git remote &>"$body"; then
+		local BODY=''
+		BODY="$(mktemp)"
+		if ! git remote &>"$BODY"; then
 			echo-error "$0: No git repository at $path"
 			return 1
-		elif test -z "$(cat "$body")"; then
+		elif test -z "$(cat "$BODY")"; then
 			echo-error "$0: No git remotes found at $path"
 			return 1
 		fi
@@ -504,18 +504,18 @@ function git_helper() (
 		function do_update {
 			git_protocol_update "$remote"
 			git config pull.ff only
-			git pull "$remote" "$(git_default_branch)"
+			git pull "$remote" "$(git_default_branch)" | tee "$BODY"
 		}
 
-		# write to body so that already updated can be detected
+		# write to BODY so that already updated can be detected
 		# write to stderr so that [git_update] returns only [failure|current|updated]
 		local update_status
-		eval_capture --statusvar=update_status --outputvar=body --outputpipe=/dev/stderr -- do_update
+		eval_capture --statusvar=update_status --outputpipe=/dev/stderr -- do_update
 		if test "$update_status" -ne 0; then
 			# update failed
 			print_line 'failure'
 			return 1
-		elif grep --quiet --fixed-strings --regexp='Already' <"$body"; then
+		elif grep --quiet --fixed-strings --regexp='Already' <"$BODY"; then
 			# already up to date
 			print_line 'current'
 		else