DDL: Standardize spaces around colon, coma... with namespaces

This rule is adding spaces around the slashes of namespaces, converting this
```
define root view entity /RHP/C_DocumentDefTP
  provider contract transactional_query
  as projection on /RHP/R_DocumentDefTP
```
into
```
define root view entity / RHP / C_DocumentDefTP
  provider contract transactional_query
  as projection on / RHP / R_DocumentDefTP
```