I see that commit b47b4dbf6 added this to varlena.c:
typedef struct varlena string;
This is a remarkably bad idea. It will cause pgindent to do strange
things anywhere it sees a variable or field named "string", of which
we have quite a few. Remember that the effects of typedef names are
*global*, so far as pgindent is concerned; not only varlena.c will
be affected.
Please rename this typedef with some less-generic name. Probably
some of the other identifiers added in the same commit should be
adjusted to match.
regards, tom lane