Fixed cpplint errors.
diff --git a/src/slave/containerizer/docker.cpp b/src/slave/containerizer/docker.cpp
index 431f7c6..4e4354f 100644
--- a/src/slave/containerizer/docker.cpp
+++ b/src/slave/containerizer/docker.cpp
@@ -1395,7 +1395,8 @@
 #endif
         container->environment,
         None(), // No extra devices.
-        flags.docker_mesos_image.isNone() ? flags.default_container_dns : None(),
+        flags.docker_mesos_image.isNone() ?
+          flags.default_container_dns : None(),
         container->resourceLimits);
 
     if (runOptions.isError()) {
@@ -1917,7 +1918,8 @@
 
     // Set CFS quota to CPU limit (if any) or to CPU request (if the
     // flag `--cgroups_enable_cfs` is true).
-    if (cpuLimit.isSome() || (flags.cgroups_enable_cfs && cpuRequest.isSome())) {
+    if (cpuLimit.isSome() ||
+        (flags.cgroups_enable_cfs && cpuRequest.isSome())) {
       Try<Nothing> write = cgroups::cpu::cfs_period_us(
           cpuHierarchy.get(),
           cpuCgroup.get(),
diff --git a/src/slave/containerizer/mesos/isolators/volume/csi/isolator.cpp b/src/slave/containerizer/mesos/isolators/volume/csi/isolator.cpp
index 8180b19..a279902 100644
--- a/src/slave/containerizer/mesos/isolators/volume/csi/isolator.cpp
+++ b/src/slave/containerizer/mesos/isolators/volume/csi/isolator.cpp
@@ -404,7 +404,6 @@
     const Option<string>& user,
     const vector<Future<string>>& futures)
 {
-
   ContainerLaunchInfo launchInfo;
   launchInfo.add_clone_namespaces(CLONE_NEWNS);
 
diff --git a/src/slave/containerizer/mesos/isolators/volume/csi/state.hpp b/src/slave/containerizer/mesos/isolators/volume/csi/state.hpp
index 6a547d0..020b82c 100644
--- a/src/slave/containerizer/mesos/isolators/volume/csi/state.hpp
+++ b/src/slave/containerizer/mesos/isolators/volume/csi/state.hpp
@@ -30,7 +30,8 @@
 
 inline bool operator==(const CSIVolume& left, const CSIVolume& right)
 {
-  return (left.plugin_name() == right.plugin_name()) && (left.id() == right.id());
+  return (left.plugin_name() == right.plugin_name()) &&
+           (left.id() == right.id());
 }
 
 } // namespace slave {
diff --git a/src/slave/flags.cpp b/src/slave/flags.cpp
index e66b464..d167e54 100644
--- a/src/slave/flags.cpp
+++ b/src/slave/flags.cpp
@@ -132,7 +132,7 @@
       "        \"NODE_SERVICE\"\n"
       "      ],\n"
       "      \"command\": {\n"
-      "        \"value\": \"<path-to-managed-plugin> --endpoint=$CSI_ENDPOINT\"\n"
+      "        \"value\": \"<path-to-managed-plugin> --endpoint=$CSI_ENDPOINT\"\n" // NOLINT(whitespace/line_length)
       "      },\n"
       "      \"resources\": [\n"
       "        {\"name\": \"cpus\", \"type\": \"SCALAR\", \"scalar\": {\"value\": 0.1}},\n" // NOLINT(whitespace/line_length)
diff --git a/src/slave/slave.cpp b/src/slave/slave.cpp
index c715951..a2d6eb7 100644
--- a/src/slave/slave.cpp
+++ b/src/slave/slave.cpp
@@ -188,8 +188,8 @@
     const Option<std::string>& user);
 
 
-// Sets the executor resource limit (the `limit` parameter) based on the resource
-// passed in (the `value` parameter).
+// Sets the executor resource limit (the `limit` parameter) based on the
+// resource passed in (the `value` parameter).
 static void setLimit(Option<Value::Scalar>& limit, const Value::Scalar& value);
 
 
diff --git a/src/tests/containerizer/docker_volume_isolator_tests.cpp b/src/tests/containerizer/docker_volume_isolator_tests.cpp
index ef58f7d..8d71ba6 100644
--- a/src/tests/containerizer/docker_volume_isolator_tests.cpp
+++ b/src/tests/containerizer/docker_volume_isolator_tests.cpp
@@ -1681,7 +1681,8 @@
 // This test verifies that unmount operation can be still invoked for
 // a docker volume even the previous unmount operation for the same
 // docker volume failed. This is a regression test for MESOS-10126.
-TEST_F(DockerVolumeIsolatorTest, ROOT_CommandTaskNoRootfsWithUnmountVolumeFailure)
+TEST_F(DockerVolumeIsolatorTest,
+       ROOT_CommandTaskNoRootfsWithUnmountVolumeFailure)
 {
   Clock::pause();
 
diff --git a/src/tests/containerizer/volume_csi_isolator_tests.cpp b/src/tests/containerizer/volume_csi_isolator_tests.cpp
index 688af4d..7cd03be 100644
--- a/src/tests/containerizer/volume_csi_isolator_tests.cpp
+++ b/src/tests/containerizer/volume_csi_isolator_tests.cpp
@@ -597,7 +597,8 @@
       TEST_CONTAINER_PATH + TEST_OUTPUT_FILE);
 
   Try<string> taskCommand2 = strings::format(
-      "while [ \"`cat %s 2>/dev/null`\" != \"%s\" ]; do : sleep 0.1 ; done; exit 0",
+      "while [ \"`cat %s 2>/dev/null`\" != \"%s\" ]; do : "
+      "sleep 0.1 ; done; exit 0",
       TEST_CONTAINER_PATH + TEST_OUTPUT_FILE,
       TEST_OUTPUT_STRING);