Merge pull request #41778 from NickrenREN/volume-typo

Automatic merge from submit-queue (batch tested with PRs 38702, 41810, 41778, 41858, 41872)

fix some typos and var style

**Release note**:

```NONE
```

pkg/volume/volume.go

@@ -71,15 +71,15 @@ type Metrics struct {
 	// InodesUsed represents the total inodes used by the Volume.
 	InodesUsed *resource.Quantity
 
-	// Inodes represents the total number of inodes availible in the volume.
+	// Inodes represents the total number of inodes available in the volume.
 	// For volumes that share a filesystem with the host (e.g. emptydir, hostpath),
 	// this is the inodes available in the underlying storage,
 	// and will not equal InodesUsed + InodesFree as the fs is shared.
 	Inodes *resource.Quantity
 
-	// InodesFree represent the inodes available for the volume.  For Volues that share
+	// InodesFree represent the inodes available for the volume.  For Volumes that share
 	// a filesystem with the host (e.g. emptydir, hostpath), this is the free inodes
-	// on the underlying sporage, and is shared with host processes and other volumes
+	// on the underlying storage, and is shared with host processes and other volumes
 	InodesFree *resource.Quantity
 }
 
@@ -154,7 +154,7 @@ type Deleter interface {
 	// as error and it will be sent as "Info" event to the PV being deleted. The
 	// volume controller will retry deleting the volume in the next periodic
 	// sync. This can be used to postpone deletion of a volume that is being
-	// dettached from a node. Deletion of such volume would fail anyway and such
+	// detached from a node. Deletion of such volume would fail anyway and such
 	// error would confuse users.
 	Delete() error
 }
@@ -167,8 +167,8 @@ type Attacher interface {
 	Attach(spec *Spec, nodeName types.NodeName) (string, error)
 
 	// VolumesAreAttached checks whether the list of volumes still attached to the specified
-	// the node. It returns a map which maps from the volume spec to the checking result.
+	// node. It returns a map which maps from the volume spec to the checking result.
-	// If an error is occured during checking, the error will be returned
+	// If an error is occurred during checking, the error will be returned
 	VolumesAreAttached(specs []*Spec, nodeName types.NodeName) (map[*Spec]bool, error)
 
 	// WaitForAttach blocks until the device is attached to this
@@ -271,16 +271,16 @@ func copyFolder(source string, dest string) (err error) {
 			continue
 		}
 
-		sourcefilepointer := source + "\\" + obj.Name()
+		sourceFilePointer := source + "\\" + obj.Name()
-		destinationfilepointer := dest + "\\" + obj.Name()
+		destinationFilePointer := dest + "\\" + obj.Name()
 
 		if obj.IsDir() {
-			err = copyFolder(sourcefilepointer, destinationfilepointer)
+			err = copyFolder(sourceFilePointer, destinationFilePointer)
 			if err != nil {
 				return err
 			}
 		} else {
-			err = copyFile(sourcefilepointer, destinationfilepointer)
+			err = copyFile(sourceFilePointer, destinationFilePointer)
 			if err != nil {
 				return err
 			}
@@ -291,25 +291,25 @@ func copyFolder(source string, dest string) (err error) {
 }
 
 func copyFile(source string, dest string) (err error) {
-	sourcefile, err := os.Open(source)
+	sourceFile, err := os.Open(source)
 	if err != nil {
 		return err
 	}
 
-	defer sourcefile.Close()
+	defer sourceFile.Close()
 
-	destfile, err := os.Create(dest)
+	destFile, err := os.Create(dest)
 	if err != nil {
 		return err
 	}
 
-	defer destfile.Close()
+	defer destFile.Close()
 
-	_, err = io.Copy(destfile, sourcefile)
+	_, err = io.Copy(destFile, sourceFile)
 	if err == nil {
-		sourceinfo, err := os.Stat(source)
+		sourceInfo, err := os.Stat(source)
 		if err != nil {
-			err = os.Chmod(dest, sourceinfo.Mode())
+			err = os.Chmod(dest, sourceInfo.Mode())
 		}
 
 	}