Fix the naming in re2_arg_test.cc.

Change-Id: I9c7957f16f243221d031b122c3c72b6322857a6a
Reviewed-on: https://code-review.googlesource.com/5321
Reviewed-by: Paul Wankadia <junyer@google.com>
diff --git a/re2/testing/re2_arg_test.cc b/re2/testing/re2_arg_test.cc
index d843ffa..06c58f1 100644
--- a/re2/testing/re2_arg_test.cc
+++ b/re2/testing/re2_arg_test.cc
@@ -106,27 +106,27 @@
   }                                                                      \
 }
 
-TEST(REArgTest, Int16Test) {
+TEST(RE2ArgTest, Int16Test) {
   PARSE_FOR_TYPE(int16, 0);
 }
 
-TEST(REArgTest, Uint16Test) {
+TEST(RE2ArgTest, Uint16Test) {
   PARSE_FOR_TYPE(uint16, 1);
 }
 
-TEST(REArgTest, IntTest) {
+TEST(RE2ArgTest, IntTest) {
   PARSE_FOR_TYPE(int, 2);
 }
 
-TEST(REArgTest, UInt32Test) {
+TEST(RE2ArgTest, Uint32Test) {
   PARSE_FOR_TYPE(uint32, 3);
 }
 
-TEST(REArgTest, Iint64Test) {
+TEST(RE2ArgTest, Int64Test) {
   PARSE_FOR_TYPE(int64, 4);
 }
 
-TEST(REArgTest, Uint64Test) {
+TEST(RE2ArgTest, Uint64Test) {
   PARSE_FOR_TYPE(uint64, 5);
 }