zpool: use tab to intend continuation from removal status

Bring the output of the removal status in line with the other
"fields" that zpool status outputs, and thus allows an parser to
easier detect this as continuation of the 'remove:' output.

Before:
remove: Removal of vdev 0 copied 282G in 0h9m, completed on [...]
    776K memory used for removed device mappings

Now:
remove: Removal of vdev 0 copied 282G in 0h9m, completed on [...]
	776K memory used for removed device mappings

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Thomas Lamprecht <[email protected]>
Closes #11674

cmd/zpool/zpool_main.c

@@ -7785,8 +7785,8 @@ print_removal_status(zpool_handle_t *zhp, pool_removal_stat_t *prs)
 		 * do not print estimated time if hours_left is more than
 		 * 30 days
 		 */
-		(void) printf(gettext("    %s copied out of %s at %s/s, "
-		    "%.2f%% done"),
+		(void) printf(gettext(
+		    "\t%s copied out of %s at %s/s, %.2f%% done"),
 		    examined_buf, total_buf, rate_buf, 100 * fraction_done);
 		if (hours_left < (30 * 24)) {
 			(void) printf(gettext(", %lluh%um to go\n"),
@@ -7801,8 +7801,8 @@ print_removal_status(zpool_handle_t *zhp, pool_removal_stat_t *prs)
 	if (prs->prs_mapping_memory > 0) {
 		char mem_buf[7];
 		zfs_nicenum(prs->prs_mapping_memory, mem_buf, sizeof (mem_buf));
-		(void) printf(gettext("    %s memory used for "
-		    "removed device mappings\n"),
+		(void) printf(gettext(
+		    "\t%s memory used for removed device mappings\n"),
 		    mem_buf);
 	}
 }