Some typos in SPARQL spec

Typos found in both Feb 20th Last Call and editor's draft (rev 1.653):

Section 11.2:
- "...will return will return..." (occurs twice)

- "...truth (T) table for true, false (F), and error (E) is ..."
   should probably read
   "...truth table for true (T), false (F), and error (E) is ..."

Section 11.2.1:
- "...Arguments expressions are..."


--
Arjohn