lib: fix few comment typos in fs/watchers.js

lib/internal/fs/watchers.js

@@ -78,7 +78,7 @@ StatWatcher.prototype[kFSStatWatcherStart] = function(filename,
     this._handle.unref();
 
   // uv_fs_poll is a little more powerful than ev_stat but we curb it for
-  // the sake of backwards compatibility
+  // the sake of backwards compatibility.
   this[kOldStatus] = -1;
 
   filename = getValidatedPath(filename, 'filename');
@@ -95,9 +95,9 @@ StatWatcher.prototype[kFSStatWatcherStart] = function(filename,
   }
 };
 
-// To maximize backward-compatiblity for the end user,
+// To maximize backward-compatibility for the end user,
 // a no-op stub method has been added instead of
-// totally removing StatWatcher.prototpye.start.
+// totally removing StatWatcher.prototype.start.
 // This should not be documented.
 StatWatcher.prototype.start = () => {};
 
@@ -133,7 +133,7 @@ function FSWatcher() {
       if (this._handle !== null) {
         // We don't use this.close() here to avoid firing the close event.
         this._handle.close();
-        this._handle = null;  // Make the handle garbage collectable
+        this._handle = null;  // Make the handle garbage collectable.
       }
       const error = errors.uvException({
         errno: status,
@@ -187,9 +187,9 @@ FSWatcher.prototype[kFSWatchStart] = function(filename,
   }
 };
 
-// To maximize backward-compatiblity for the end user,
+// To maximize backward-compatibility for the end user,
 // a no-op stub method has been added instead of
-// totally removing FSWatcher.prototpye.start.
+// totally removing FSWatcher.prototype.start.
 // This should not be documented.
 FSWatcher.prototype.start = () => {};
 
@@ -204,7 +204,7 @@ FSWatcher.prototype.close = function() {
     return;
   }
   this._handle.close();
-  this._handle = null;  // Make the handle garbage collectable
+  this._handle = null;  // Make the handle garbage collectable.
   process.nextTick(emitCloseNT, this);
 };