docs: formatting

9 jobs for improve-docs in 4 minutes and 5 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed clang-c++11 #67342
Linux

00:03:46

passed cppcheck #67344
Linux

00:00:47

passed doc #67349
Linux

00:00:22

passed gcc-c++11 #67341
Linux

00:04:03

passed macos-c++11 #67343
Apple

00:03:01

passed VS2015-32-bit #67348
VS2015

00:01:15

passed VS2015-64-bit #67347
VS2015

00:01:25

passed VS2017-32-bit #67346
VS2017

00:01:20

passed VS2017-64-bit #67345
VS2015

00:01:17