Fixed Typo

6 jobs for master
Status Name Job ID Coverage
  Test
passed clang-c++11 #3299
Linux

00:04:34

passed clang-c++98 #3301
Linux

00:04:07

passed gcc-c++11 #3298
Linux

00:07:42

passed gcc-c++98 #3300
Linux

00:04:49

passed macos-c++11 #3302
Apple

00:03:52

passed macos-c++98 #3303
Apple

00:03:43