extern ULONGEST get_frame_register_unsigned (struct frame_info *frame,
int regnum);
-/* Read a a register from this, or unwind a register from the next
+/* Read a register from this, or unwind a register from the next
frame. Note that the read_frame methods are wrappers to
get_frame_register_value, that do not throw if the result is
optimized out or unavailable. */