Add doxygen comments for `count_ne_1` #147

Job	Run time
build (--disable-openmp, --with-yaml, --enable-deprecated-io)	10m 52s
build (--disable-openmp, --with-yaml, --disable-deprecated-io)	11m 14s
build (--disable-openmp, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	13m 21s
build (--disable-openmp, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	12m 45s
build (--enable-mixed-mode, --with-yaml, --enable-deprecated-io)	11m 6s
build (--enable-mixed-mode, --with-yaml, --disable-deprecated-io)	10m 53s
build (--enable-mixed-mode, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	12m 28s
build (--enable-mixed-mode, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	12m 15s
build (--disable-setting-flags, --with-yaml, --enable-deprecated-io)	12m 30s
build (--disable-setting-flags, --with-yaml, --disable-deprecated-io)	12m 10s
build (--disable-setting-flags, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	12m 59s
build (--disable-setting-flags, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	12m 35s
build (--with-mpi=no, --with-yaml, --enable-deprecated-io)	4m 44s
build (--with-mpi=no, --with-yaml, --disable-deprecated-io)	4m 16s
build (--with-mpi=no, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	5m 17s
build (--with-mpi=no, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	5m 36s
	2h 45m 1s

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