check whether any of the children of pd has token on the same line as
the closing token of pd. If so, unindent that token.
set_unindention_child(pd, token = "')'", unindent_by)
| pd | A parse table. |
|---|---|
| token | The token the unindention should be based on. |
| unindent_by | By how many spaces one level of indention is reversed. |