expr: Fix typo in comment.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>

diff --git a/ovn/lib/expr.h b/ovn/lib/expr.h
index 501152e..b411e65 100644 (file)
--- a/ovn/lib/expr.h
+++ b/ovn/lib/expr.h
@@ -293,7 +293,7 @@ bool expr_relop_from_token(enum lex_type type, enum expr_relop *relop);
  *       have grandchildren of its own type.
  *
  *       As a consequence, every nonterminal node at the same distance from the
- *       root of the root has the same type.
+ *       root has the same type.
  *
  *     - EXPR_T_AND and EXPR_T_OR nodes must have at least two children.
  *