diff --git a/js/aceBindings.js b/js/aceBindings.js
index 62ba922..231cb5c 100644
--- a/js/aceBindings.js
+++ b/js/aceBindings.js
@@ -133,7 +133,7 @@ define([
         var range = selection.getLineRange(i);
         range.end.row = range.start.row;
         range.end.column = line.length;
-        line = line.replace(/\s+$/, "");
+        line = line.replace(/(\S)\s+$/, "$1");
         doc.replace(range, line);
       });
       if (c) c();
@@ -166,4 +166,4 @@ define([
       if (c) c();
     });
 
-});
\ No newline at end of file
+});