[SQL][MINOR] Fix minor formatting issues in SHOW CREATE TABLE output

## What changes were proposed in this pull request?

This PR fixes two minor formatting issues appearing in `SHOW CREATE TABLE` output.

Before:

```
CREATE EXTERNAL TABLE ...
...
WITH SERDEPROPERTIES ('serialization.format' = '1'
)
...
TBLPROPERTIES ('avro.schema.url' = '/tmp/avro/test.avsc',
  'transient_lastDdlTime' = '1466638180')
```

After:

```
CREATE EXTERNAL TABLE ...
...
WITH SERDEPROPERTIES (
  'serialization.format' = '1'
)
...
TBLPROPERTIES (
  'avro.schema.url' = '/tmp/avro/test.avsc',
  'transient_lastDdlTime' = '1466638180'
)
```

## How was this patch tested?

Manually tested.

Author: Cheng Lian <lian@databricks.com>

Closes #13864 from liancheng/show-create-table-format-fix.