Fixed order of smoother parameters in the documentation. (Thanks to Takashi...

Fixed order of smoother parameters in the documentation. (Thanks to Takashi Michikawa for the info).

(cherry picked from commit af50ec1e)
6 jobs for master
Status Name Job ID Coverage
  Test
passed clang-c++11 #3070
Linux

00:21:07

passed clang-c++98 #3072
Linux

00:16:57

passed gcc-c++11 #3069
Linux

00:04:59

passed gcc-c++98 #3071
Linux

00:03:46

passed macos-c++11 #3073
Apple

00:08:56

passed macos-c++98 #3074
Apple

00:08:24