fix linter problems

Author: boxofyellow

share/github-backup-utils/ghe-backup-mssql

@@ -30,11 +30,11 @@ export_tool_available() {
 }
 
 ghe_ssh_mssql() {
-  ghe-ssh $opts $ssh_config_file_opt "$GHE_MSSQL_PRIMARY_HOST" "$@"
+  ghe-ssh "$opts" "$ssh_config_file_opt" "$GHE_MSSQL_PRIMARY_HOST" "$@"
 }
 
 cleanup() {
-  rm -rf $tempdir
+  rm -rf "$tempdir"
 }
 trap 'cleanup' EXIT INT
 
@@ -69,10 +69,10 @@ add_minute() {
   # Expect date string in the format of yyyymmddTHHMMSS
   # Here parse date differently depending on GNU Linux vs BSD MacOS
   if date -v -1d > /dev/null 2>&1; then
-    echo "$(date -v +$2M -ujf'%Y%m%dT%H%M%S' $1 +%Y%m%dT%H%M%S)"
+    date -v +"$2"M -ujf'%Y%m%dT%H%M%S' "$1" +%Y%m%dT%H%M%S
   else
     dt=$1
-    echo "$(date -u '+%Y%m%dT%H%M%S' -d "${dt:0:8} ${dt:9:2}:${dt:11:2}:${dt:13:2} $2 minutes")"
+    date -u '+%Y%m%dT%H%M%S' -d "${dt:0:8} ${dt:9:2}:${dt:11:2}:${dt:13:2} $2 minutes"
   fi
 }