From 44e452fb3c8cc7a093d72fbc280be3973e627a62 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Fri, 19 Apr 2019 21:26:04 -0400
Subject: Add braces to param exps in arith substs

---
(limited to 'src/control.sh')

diff --git a/src/control.sh b/src/control.sh
index b25d00b..c8d742c 100644
--- a/src/control.sh
+++ b/src/control.sh
@@ -39,7 +39,7 @@ parse_control()
 	in_paragraph='false'
 
 	while IFS='' read -r line; do
-		control_line_nr=$(($control_line_nr + 1))
+		control_line_nr=$((${control_line_nr} + 1))
 		if [ "x$(echo ${line})" = 'x' ]; then
 			# Paragraph end.
 			if ${in_paragraph}; then
--
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