all: fix typos and spelling

Change-Id: Icd06d99c42b8299fd931c7da821e1f418684d913
Reviewed-on: https://go-review.googlesource.com/19829
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/src/database/sql/sql_test.go b/src/database/sql/sql_test.go
index 8ec70d9..68f17fb 100644
--- a/src/database/sql/sql_test.go
+++ b/src/database/sql/sql_test.go
@@ -1591,7 +1591,7 @@
 
 	_, err := db.Query("SELECT|non_existent|name|")
 	if err == nil {
-		t.Fatal("Quering non-existent table should fail")
+		t.Fatal("Querying non-existent table should fail")
 	}
 }