Ticket #2235: be-tarask.po should be renamed to be@tarask.po

Additionally, removed extra space from the README file.

po/LINGUAS

@@ -1,3 +1,3 @@
 # List of available translations.
-az be be-tarask bg ca cs da de el es eu fi fr hu it ja ko lt lv mn nb nl pl
+az be be@tarask bg ca cs da de el es eu fi fr hu it ja ko lt lv mn nb nl pl
 pt pt_BR ro ru sk sl sr sv ta tr uk vi wa zh_CN zh_TW

po/README

@@ -9,5 +9,5 @@ Some of the translatable strings are special. They start with one of the
 following prefixes to distinguish them from the usual translations.
 
 ButtonBar|
- 	These strings are used in the button bar at the bottom of the
+	These strings are used in the button bar at the bottom of the
 	screen. Only the first six characters will be shown.