Apply suggestions from code review

Co-authored-by: Pieter Eendebak <pieter.eendebak@gmail.com>

Author: colesbury

Include/internal/pycore_interp.h

@@ -44,7 +44,7 @@ struct _Py_long_state {
 struct _stoptheworld_state {
     PyMutex mutex;       // Serializes stop-the-world attempts.
 
-    // NOTE: The below fields are protected by HEAD_LOCK(runtime), not by the
+    // NOTE: The fields below are protected by HEAD_LOCK(runtime), not by the
     // above mutex.
     bool requested;      // Set when a pause is requested.
     bool world_stopped;  // Set when the world is stopped.

Include/internal/pycore_pystate.h

@@ -154,7 +154,7 @@ extern void _PyThreadState_Detach(PyThreadState *tstate);
 // "attached" state.
 extern void _PyThreadState_Park(PyThreadState *tstate);
 
-// Perform a stop-the-world pause for all threads in the all interpreters.
+// Perform a stop-the-world pause for all threads in all interpreters.
 //
 // Threads in the "attached" state are paused and transitioned to the "GC"
 // state. Threads in the "detached" state switch to the "GC" state, preventing