add release note (#633)

docs/release-notes.md

@@ -9,6 +9,7 @@ These changes have not been released yet.
   * Fixed Save Backup not pruning old backups if they're uncompressed.
   * Fixed issues when a farmhand reconnects before the game notices they're disconnected.
   * Fixed 'received message' logs shown in non-developer mode.
+  * Fixed compatibility with Arch Linux.
 
 * For modders:
   * Added support for content pack translations.

src/SMAPI.Installer/unix-launcher.sh

@@ -81,8 +81,8 @@ else
         konsole -p Environment=TERM=xterm -e "$LAUNCHER"
     elif $COMMAND terminal 2>/dev/null; then
         terminal -e "sh -c 'TERM=xterm $LAUNCHER'"
-	elif $COMMAND termite 2>/dev/null; then
-		termite -e "sh -c 'TERM=xterm $LAUNCHER'"
+    elif $COMMAND termite 2>/dev/null; then
+        termite -e "sh -c 'TERM=xterm $LAUNCHER'"
     else
         sh -c 'TERM=xterm $LAUNCHER'
     fi