Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision d0b6712f8ebd0f48c74c0986a0aec540097ee207)
+++ doc/bibliography/pl.bib	(revision 5e8d75bbda1b63dfcc63fb0a003758c17cc3fae5)
@@ -1,3 +1,2 @@
-
 % Conventions: uncross-referenced entries appear first, then
 %    cross-referenced entries.  In both groups, entries are sorted by their