Index: trunk/doc/release.2015/inputs/code.sty
===================================================================
--- trunk/doc/release.2015/inputs/code.sty	(revision 41208)
+++ trunk/doc/release.2015/inputs/code.sty	(revision 41315)
@@ -72,2 +72,4 @@
 % \textsl - slated
 % \textsc - small caps
+
+\def\arctantwo{\mathop{\operator@font arctan2}}