Fix empty contexts in kwic

Change-Id: I5bc89e6d79eddaf78647a68cfbe9b1037ef24d02
diff --git a/dev/scss/main/kwic-new.scss b/dev/scss/main/kwic-new.scss
index 994a905..5776004 100644
--- a/dev/scss/main/kwic-new.scss
+++ b/dev/scss/main/kwic-new.scss
@@ -307,6 +307,14 @@
   }
 }
 
+// fix empty contexts
+#search ol span.context-left,
+#search ol span.context-right {
+  &:empty::after {
+    content: " ";
+    display: inline-block;
+  }
+}
 
 /**
  * Highlights