Function normalize_dbms_metadata_ddl 

pub fn normalize_dbms_metadata_ddl(text: &str) -> String

Normalize DDL text emitted by DBMS_METADATA.GET_DDL so equality checks across runs ignore cosmetic differences:

• Trim leading + trailing whitespace.
• Collapse runs of whitespace inside the body to a single space (newlines are preserved as-is so the result remains readable).
• Strip the trailing / SQL*Plus terminator if present.