docs: extend: plugins_volume.md: Err default to empty string
@@ -65,7 +65,7 @@ Opts is a map of driver specific options passed through from the user request.
**Response**:
```
{
- "Err": null
+ "Err": ""
}
```
@@ -85,7 +85,7 @@ Delete the specified volume from disk. This request is issued when a user invoke
**Response**:
```
{
- "Err": null
+ "Err": ""
}
```
@@ -109,7 +109,7 @@ at the first mount request and deprovision at the last corresponding unmount req
```
{
"Mountpoint": "/path/to/directory/on/host",
- "Err": null
+ "Err": ""
}
```
@@ -131,7 +131,7 @@ Docker needs reminding of the path to the volume on the host.
```
{
"Mountpoint": "/path/to/directory/on/host",
- "Err": null
+ "Err": ""
}
```
@@ -154,7 +154,7 @@ this point.
**Response**:
```
{
- "Err": null
+ "Err": ""
}
```
