Stop using needless {} in vars

sh/runtests.sh

@@ -1,25 +1,25 @@
 #!/bin/sh
 
-top_srcdir=${top_srcdir:-..}
-. ${top_srcdir}/test/setup_env.sh
+: ${top_srcdir:=..}
+. $top_srcdir/test/setup_env.sh
 
 ret=0
 
 tret=0
 ebegin "Testing yesno()"
 for f in yes YES Yes true TRUE True 1 ; do
-	if ! yesno ${f} ; then
-		tret=$((${tret} + 1))
-		echo "!${f}!"
+	if ! yesno $f; then
+		tret=$(($tret + 1))
+		echo "!$f!"
 	fi
 done
 for f in no NO No false FALSE False 0 ; do
-	if yesno ${f} ; then
-		tret=$(({$tret} + 1))
-		echo "!${f}!"
+	if yesno $f; then
+		tret=$(($tret + 1))
+		echo "!$f!"
 	fi
 done
-eend ${tret}
-ret=$((${ret} + ${tret}))
+eend $tret
+ret=$(($ret + $tret))
 
-exit ${ret}
+exit $ret