Index: doc/developer/data.html
===================================================================
--- doc/developer/data.html	(revision 10462)
+++ doc/developer/data.html	(revision 10463)
@@ -115,7 +115,7 @@
 object pcb_data_t holds is an element. An element can have pads
 on two copper layers and pins that affect all layers the same way as vias.
 <p>
-The third global object is subcircuit; using tis own layer list, it potentially
+The third global object is subcircuit; using its own layer list, it potentially
 can affect all layers of the board. The children objects of a subcircuit is
 a pcb_data_t, which allows arbitrary (loop-free) recursion in data.