Left-align index props

Index type props display as strings, which should be aligned to the
left not to the right.

Before:
```
FreeBSD-13_0-CURRENT-r356528 ➜  ~ zfs list -ro name,aclmode,mountpoint
NAME        ACLMODE  MOUNTPOINT
p0      passthrough  /p0
p0/foo      discard  /p0/foo
```

After:
```
FreeBSD-13_0-CURRENT-r356528 ➜  ~ zfs list -ro name,aclmode,mountpoint
NAME    ACLMODE      MOUNTPOINT
p0      passthrough  /p0
p0/foo  discard      /p0/foo
```

Reviewed-by: Igor Kozhukhov <[email protected]>
Reviewed-by: George Melikov <[email protected]>
Reviewed-by: Alexander Motin <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Ryan Moeller <[email protected]>
Closes #9912 

1 files changed, 1 insertions, 1 deletions

diff --git a/module/zcommon/zprop_common.c b/module/zcommon/zprop_common.c
index 2f473413a..faab9d9a7 100644
--- a/module/zcommon/zprop_common.c
+++ b/module/zcommon/zprop_common.c
@@ -143,7 +143,7 @@ zprop_register_index(int prop, const char *name, uint64_t def,
     const char *colname, const zprop_index_t *idx_tbl)
 {
 	zprop_register_impl(prop, name, PROP_TYPE_INDEX, def, NULL, attr,
-	    objset_types, values, colname, B_TRUE, B_TRUE, idx_tbl);
+	    objset_types, values, colname, B_FALSE, B_TRUE, idx_tbl);
 }
 
 void