Apply suggestions from code review

Co-authored-by: Boris Zbarsky <bzbarsky@apple.com>

examples/chip-tool/commands/pairing/PairingCommand.cpp

@@ -62,7 +62,7 @@ CHIP_ERROR PairingCommand::RunInternal(NodeId remoteId)
 
     //
     // We're about to call methods into the stack, so lock
-    // appropriately. None of the following calls below before the unlock are, nor should be
+    // appropriately. None of the following calls below before the unlock are, nor should be,
     // blocking.
     //
     {

src/controller/CHIPDeviceController.h

@@ -196,7 +196,8 @@ class DLL_EXPORT DeviceController : public Messaging::ExchangeDelegate,
      *  This expects to be called with external thread synchronization, and will not internally
      *  grab the CHIP stack lock.
      *
-     *  This will also not stop the CHIP event queue / thread (if one exists).
+     *  This will also not stop the CHIP event queue / thread (if one exists).  Consumers are expected to
+     *  ensure this happend before calling this method.
      */
     virtual CHIP_ERROR Shutdown();
 

src/include/platform/internal/GenericPlatformManagerImpl_POSIX.cpp

@@ -240,7 +240,7 @@ void GenericPlatformManagerImpl_POSIX<ImplClass>::_RunEventLoop()
     //
     // If we haven't set mHasValidChipTask by now, it means that the application did not call StartEventLoopTask
     // and consequently, are running the event loop from their own, externally managed task.
-    // Let's trackt his appropriately since we need this info later when stopping the event queues.
+    // Let's track his appropriately since we need this info later when stopping the event queues.
     //
     if (!mHasValidChipTask)
     {

src/include/platform/internal/GenericPlatformManagerImpl_POSIX.h

@@ -77,7 +77,7 @@ class GenericPlatformManagerImpl_POSIX : public GenericPlatformManagerImpl<ImplC
 
     //
     // TODO: This variable is very similar to mMainLoopIsStarted, track the
-    // cleanup and consolidated in this issue:
+    // cleanup and consolidation in this issue:
     //
     bool mEventQueueHasStopped = false;