Moar minor tablet selection tweaks

Signed-off-by: Matt Lord <[email protected]>

content/en/docs/16.0/reference/vreplication/tablet_selection.md

@@ -15,25 +15,26 @@ need to replicate the streamed writes within the target shard.
 
 ### Cells
 
-By default the `TabletPicker` will only look for viable (healthy and serving) source tablets within the local cell of the calling process — the `vtgate`
-managing the VStream or the target `vttablet` for the VReplication stream — and it will select a random one from the candidate list. If you want to support
-cross-cell streams then you will need to specify the list of cells or any [CellAlias](https://vitess.io/docs/reference/programs/vtctl/cell-aliases/) that
-contain the list of potential cells using the `--cells` flag in your VReplication workflow commands like [`MoveTables`](../movetables/) or the
+By default the `TabletPicker` will only look for viable (healthy and serving) source tablets of the specified tablet type(s) within the local cell of the
+calling process — the `vtgate` managing the VStream or the target `vttablet` for the VReplication stream — and it will select a random one from the candidate
+list. If you want to support cross-cell streams then you will need to specify the list of cells or any
+[CellAlias](https://vitess.io/docs/reference/programs/vtctl/cell-aliases/) that contain a list of cells using the `--cells` flag in your VReplication
+workflow commands like [`MoveTables`](../movetables/) or the
 [`VStreamFlags.Cells`](https://pkg.go.dev/vitess.io/vitess/go/vt/proto/vtgate#VStreamFlags) field in a
 [`VStreamRequest`](https://pkg.go.dev/vitess.io/vitess/go/vt/proto/vtgate#VStreamRequest).
 
 ### Tablet Types
 
 #### VReplication
-For VReplication, the server side default which determines the candidate types made available for potential selection in a stream is set using the
-[`vttablet` `--vreplication_tablet_type` flag](../flags/#vreplication_tablet_type) (default value is `in_order:REPLICA,PRIMARY`). The target tablet will
-provide this value to the `TabletPicker` to determine the viable source tablet candidates. You can override this default on the client side using your
+For VReplication, the server side default which determines the candidate types made available for potential selection as the source for a stream is set
+using the [`vttablet` `--vreplication_tablet_type` flag](../flags/#vreplication_tablet_type) (default value is `in_order:REPLICA,PRIMARY`). The target tablet
+will provide this value to the `TabletPicker` to determine the viable source tablet candidates. You can override this default on the client side using your
 workflow command's `--tablet_types` flag.
 
 You can also specify an order of preference for the tablet types using the `in_order:` prefix in both the server and client flags. For example,
 `--tablet_types "in_order:REPLICA,PRIMARY"` would cause a replica source tablet to be used whenever possible and a primary tablet would only be used as
 a fallback in the event that there are no viable replica tablets available at the time.
 
 #### VStream
-For a VStream there is no default tablet type, you must specify an individual tablet type using the
+For a VStream there is no default tablet type. You must specify an individual tablet type using the
 [`VStreamRequest.TabletType`](https://pkg.go.dev/vitess.io/vitess/go/vt/proto/vtgate#VStreamRequest) field.