Initial pgindent and pgperltidy run for v13.

Includes some manual cleanup of places that pgindent messed up,
most of which weren't per project style anyway.

Notably, it seems some people didn't absorb the style rules of
commit c9d297751, because there were a bunch of new occurrences
of function calls with a newline just after the left paren, all
with faulty expectations about how the rest of the call would get
indented.

src/backend/access/hash/hashutil.c

@@ -144,6 +144,7 @@ _hash_spareindex(uint32 num_bucket)
 {
 	uint32		splitpoint_group;
 	uint32		splitpoint_phases;
+
 	splitpoint_group = pg_ceil_log2_32(num_bucket);
 
 	if (splitpoint_group < HASH_SPLITPOINT_GROUPS_WITH_ONE_PHASE)

src/backend/access/hash/hashvalidate.c

@@ -318,7 +318,7 @@ check_hash_func_signature(Oid funcid, int16 amprocnum, Oid argtype)
 			 argtype == XIDOID || argtype == CIDOID))
 			 /* okay, allowed use of hashint4() */ ;
 		else if ((funcid == F_HASHINT8 || funcid == F_HASHINT8EXTENDED) &&
-			(argtype == XID8OID))
+				 (argtype == XID8OID))
 			 /* okay, allowed use of hashint8() */ ;
 		else if ((funcid == F_TIMESTAMP_HASH ||
 				  funcid == F_TIMESTAMP_HASH_EXTENDED) &&