fix(ietd.tmpl): fix salt-lint errors

```bash
Examining iscsi/target/config/files/default/ietd.tmpl of type state
[206] Jinja variables should have spaces before and after: {{ var_name }}
iscsi/target/config/files/default/ietd.tmpl:17
{{shift}}{{ key }}

[206] Jinja variables should have spaces before and after: {{ var_name }}
iscsi/target/config/files/default/ietd.tmpl:20
{{shift}}{{ key }} {{ "'" if value is not string else ''}}{{ value }}{{"'" if value is not string else ''}}
```

Author: myii

iscsi/target/config/files/default/ietd.tmpl

@@ -14,10 +14,10 @@
 {%- macro ietd(key, value, spaces=0, last=False) -%}
   {%- set shift = spaces * ' ' -%}
 {%- if value is mapping %}
-{{shift}}{{ key }}
+{{ shift }}{{ key }}
 {{ readconf(value, spaces|int+4) }}
 {%- elif value is string or value is number %}
-{{shift}}{{ key }} {{ "'" if value is not string else ''}}{{ value }}{{"'" if value is not string else ''}}
+{{ shift }}{{ key }} {{ "'" if value is not string else '' }}{{ value }}{{ "'" if value is not string else '' }}
 {%- endif %}
 {%- endmacro -%}