Fix texts and comments

changelog/unreleased/pull-3067

@@ -2,21 +2,21 @@ Enhancement: Add options to configure Windows Shadow Copy Service
 
 Restic always used 120 sec. timeout and unconditionally created VSS snapshots
 for all volume mount points on disk. Now this behavior can be fine-tuned by
-new options, like exclude user specific volumes and mount points or completely
+new options, like exclude specific volumes and mount points or completely
 disable auto snapshotting of volume mount points.
 
 For example:
 
-    restic backup --use-fs-snapshot -o vss.timeout=5m -o vss.excludeallmountpoints=true
+    restic backup --use-fs-snapshot -o vss.timeout=5m -o vss.exclude-all-mount-points=true
-    
+
 changes timeout to five minutes and disable snapshotting of mount points on all volumes, and
 
-    restic backup --use-fs-snapshot -o vss.excludevolumes="d:\;c:\mnt\;\\?\Volume{e2e0315d-9066-4f97-8343-eb5659b35762}"
+    restic backup --use-fs-snapshot -o vss.exclude-volumes="d:\;c:\mnt\;\\?\Volume{e2e0315d-9066-4f97-8343-eb5659b35762}"
 
-excludes drive `D:`, mount point `C:\MNT` and specific volume from VSS snapshotting.
+excludes drive `d:`, mount point `c:\mnt` and specific volume from VSS snapshotting.
 
     restic backup --use-fs-snapshot -o vss.provider={b5946137-7b9f-4925-af80-51abd60b20d5}
-    
+
 uses 'Microsoft Software Shadow Copy provider 1.0' instead of the default provider.
 
 https://github.com/restic/restic/pull/3067

doc/040_backup.rst

@@ -59,21 +59,21 @@ exclusively locked by another process during the backup.
 You can use additional options to change VSS behaviour:
 
  * ``-o vss.timeout`` specifies timeout for VSS snapshot creation, the default value is 120 seconds
- * ``-o vss.excludeallmountpoints`` disable auto snapshotting of all volume mount points
+ * ``-o vss.exclude-all-mount-points`` disable auto snapshotting of all volume mount points
- * ``-o vss.excludevolumes`` allows excluding specific volumes or volume mount points from snapshotting
+ * ``-o vss.exclude-volumes`` allows excluding specific volumes or volume mount points from snapshotting
  * ``-o vss.provider`` specifies VSS provider used for snapshotting
 
-E.g., 2.5 minutes timeout with mount points snapshotting disabled can be specified as
+For example a 2.5 minutes timeout with snapshotting of mount points disabled can be specified as
 
 .. code-block:: console
 
-    -o vss.timeout=2m30s -o vss.excludeallmountpoints=true
+    -o vss.timeout=2m30s -o vss.exclude-all-mount-points=true
 
-and excluding drive ``D:\``, mount point ``C:\mnt`` and volume ``\\?\Volume{04ce0545-3391-11e0-ba2f-806e6f6e6963}\`` as
+and excluding drive ``d:\``, mount point ``c:\mnt`` and volume ``\\?\Volume{04ce0545-3391-11e0-ba2f-806e6f6e6963}\`` as
 
 .. code-block:: console
 
-    -o vss.excludevolumes="d:;c:\MNT\;\\?\volume{04ce0545-3391-11e0-ba2f-806e6f6e6963}"
+    -o vss.exclude-volumes="d:;c:\mnt\;\\?\volume{04ce0545-3391-11e0-ba2f-806e6f6e6963}"
 
 VSS provider can be specified by GUID
 

internal/fs/fs_local_vss_test.go

@@ -127,10 +127,12 @@ func TestParseMountPoints(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	// We don't know a valid volume GUID path for C:\, but we'll at least check its format
+	// We don't know a valid volume GUID path for c:\, but we'll at least check its format
 	if !volumeMatch.MatchString(sysVolume) {
 		t.Fatalf("invalid volume GUID path: %s", sysVolume)
 	}
+	// Changing the case and removing trailing backslash allows tests
+	// the equality of different ways of writing a volume name
 	sysVolumeMutated := strings.ToUpper(sysVolume[:len(sysVolume)-1])
 	sysVolumeMatch := strings.ToLower(sysVolume)
 

internal/fs/vss.go

@@ -33,7 +33,7 @@ func HasSufficientPrivilegesForVSS() error {
 	return errors.New("VSS snapshots are only supported on windows")
 }
 
-// GetVolumeNameForVolumeMountPoint clear input parameter
+// GetVolumeNameForVolumeMountPoint add trailing backslash to input parameter
 // and calls the equivalent windows api.
 func GetVolumeNameForVolumeMountPoint(mountPoint string) (string, error) {
 	return mountPoint, nil

internal/fs/vss_windows.go

@@ -828,7 +828,7 @@ func HasSufficientPrivilegesForVSS() error {
 	return err
 }
 
-// GetVolumeNameForVolumeMountPoint clear input parameter
+// GetVolumeNameForVolumeMountPoint add trailing backslash to input parameter
 // and calls the equivalent windows api.
 func GetVolumeNameForVolumeMountPoint(mountPoint string) (string, error) {
 	if mountPoint != "" && mountPoint[len(mountPoint)-1] != filepath.Separator {