fix issue 19374 - TypeVector undefined in grammar

[ghost]

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	19374	minor	TypeVector undefined in grammar

[rainers]

LGTM.
While the link for TypeVector jumped into the name mangling grammar before, the latter now jumps back to the added rule. Can this be disambiguated?
Maybe the mangling grammar should not be on this page to begin with.

[ghost]

Done, renamed the rule "Vector".