Correcting 1 line in en_us

Author: michaeldemey

src/main/resources/bundles/rups-lang_en_US.properties

@@ -74,7 +74,7 @@ ERROR_NO_OPEN_DOCUMENT=There is no open document.
 ERROR_NO_OPEN_DOCUMENT_COMPARE=There is no open document. Nothing to compare with.
 ERROR_ONLY_OPEN_ONE_FILE=You can only open one file!
 ERROR_OPENING_FILE=Error opening file: %s
-ERROR_PARENT_NULL=Parent node is null for 
+ERROR_PARENT_NULL=Parent node is null.
 ERROR_PARSING_IMAGE=Error while parsing Image.
 ERROR_PARSING_PDF_OBJECT=Error while parsing PDF syntax.
 ERROR_PARSING_PDF_STREAM=Error while parsing PdfStream.