Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision 8c3516cd9c2c6334491d550e4db2856fc9f71fc2)
+++ doc/bibliography/pl.bib	(revision c0beea3fb26bfb242919205329cfe48d876b6dd4)
@@ -1,3 +1,2 @@
-
 % Conventions: uncross-referenced entries appear first, then
 %    cross-referenced entries.  In both groups, entries are sorted by their