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/commands/opclasscmds.c

@@ -338,7 +338,7 @@ DefineOpClass(CreateOpClassStmt *stmt)
 				opfamilyoid,	/* oid of containing opfamily */
 				opclassoid;		/* oid of opclass we create */
 	int			maxOpNumber,	/* amstrategies value */
-				optsProcNumber,	/* amoptsprocnum value */
+				optsProcNumber, /* amoptsprocnum value */
 				maxProcNumber;	/* amsupport value */
 	bool		amstorage;		/* amstorage flag */
 	List	   *operators;		/* OpFamilyMember list for operators */
@@ -779,7 +779,7 @@ AlterOpFamily(AlterOpFamilyStmt *stmt)
 	Oid			amoid,			/* our AM's oid */
 				opfamilyoid;	/* oid of opfamily */
 	int			maxOpNumber,	/* amstrategies value */
-				optsProcNumber,	/* amopclassopts value */
+				optsProcNumber, /* amopclassopts value */
 				maxProcNumber;	/* amsupport value */
 	HeapTuple	tup;
 	Form_pg_am	amform;
@@ -1252,6 +1252,7 @@ assignProcTypes(OpFamilyMember *member, Oid amoid, Oid typeoid,
 				ereport(ERROR,
 						(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
 						 errmsg("btree equal image functions must return boolean")));
+
 			/*
 			 * pg_amproc functions are indexed by (lefttype, righttype), but
 			 * an equalimage function can only be called at CREATE INDEX time.