Manual cleanup and pgindent of pgstat and bufmgr related code

This is in preparation for commiting a larger patch series in the area.

Discussion: https://postgr.es/m/CAAKRu_bHwGEbzNxxy+MQDkrsgog6aO6iUvajJ4d6PD98gFU7+w@mail.gmail.com

src/backend/storage/buffer/bufmgr.c

@@ -3297,8 +3297,8 @@ DropRelationsAllBuffers(SMgrRelation *smgr_reln, int nlocators)
 		uint32		buf_state;
 
 		/*
-		 * As in DropRelationBuffers, an unlocked precheck should be
+		 * As in DropRelationBuffers, an unlocked precheck should be safe and
-		 * safe and saves some cycles.
+		 * saves some cycles.
 		 */
 
 		if (!use_bsearch)
@@ -3425,8 +3425,8 @@ DropDatabaseBuffers(Oid dbid)
 		uint32		buf_state;
 
 		/*
-		 * As in DropRelationBuffers, an unlocked precheck should be
+		 * As in DropRelationBuffers, an unlocked precheck should be safe and
-		 * safe and saves some cycles.
+		 * saves some cycles.
 		 */
 		if (bufHdr->tag.dbOid != dbid)
 			continue;
@@ -3572,8 +3572,8 @@ FlushRelationBuffers(Relation rel)
 		bufHdr = GetBufferDescriptor(i);
 
 		/*
-		 * As in DropRelationBuffers, an unlocked precheck should be
+		 * As in DropRelationBuffers, an unlocked precheck should be safe and
-		 * safe and saves some cycles.
+		 * saves some cycles.
 		 */
 		if (!BufTagMatchesRelFileLocator(&bufHdr->tag, &rel->rd_locator))
 			continue;
@@ -3645,8 +3645,8 @@ FlushRelationsAllBuffers(SMgrRelation *smgrs, int nrels)
 		uint32		buf_state;
 
 		/*
-		 * As in DropRelationBuffers, an unlocked precheck should be
+		 * As in DropRelationBuffers, an unlocked precheck should be safe and
-		 * safe and saves some cycles.
+		 * saves some cycles.
 		 */
 
 		if (!use_bsearch)
@@ -3880,8 +3880,8 @@ FlushDatabaseBuffers(Oid dbid)
 		bufHdr = GetBufferDescriptor(i);
 
 		/*
-		 * As in DropRelationBuffers, an unlocked precheck should be
+		 * As in DropRelationBuffers, an unlocked precheck should be safe and
-		 * safe and saves some cycles.
+		 * saves some cycles.
 		 */
 		if (bufHdr->tag.dbOid != dbid)
 			continue;

src/backend/storage/buffer/localbuf.c

@@ -610,8 +610,8 @@ AtProcExit_LocalBuffers(void)
 {
 	/*
 	 * We shouldn't be holding any remaining pins; if we are, and assertions
-	 * aren't enabled, we'll fail later in DropRelationBuffers while
+	 * aren't enabled, we'll fail later in DropRelationBuffers while trying to
-	 * trying to drop the temp rels.
+	 * drop the temp rels.
 	 */
 	CheckForLocalBufferLeaks();
 }

src/backend/utils/activity/pgstat.c

@@ -986,6 +986,7 @@ pgstat_build_snapshot(void)
 
 		entry->data = MemoryContextAlloc(pgStatLocal.snapshot.context,
 										 kind_info->shared_size);
+
 		/*
 		 * Acquire the LWLock directly instead of using
 		 * pg_stat_lock_entry_shared() which requires a reference.

src/backend/utils/activity/pgstat_relation.c

@@ -783,6 +783,7 @@ pgstat_relation_flush_cb(PgStat_EntryRef *entry_ref, bool nowait)
 	if (lstats->t_counts.t_numscans)
 	{
 		TimestampTz t = GetCurrentTransactionStopTimestamp();
+
 		if (t > tabentry->lastscan)
 			tabentry->lastscan = t;
 	}

src/include/pgstat.h

@@ -476,6 +476,7 @@ extern void pgstat_report_connect(Oid dboid);
 
 extern PgStat_StatDBEntry *pgstat_fetch_stat_dbentry(Oid dboid);
 
+
 /*
  * Functions in pgstat_function.c
  */

src/include/utils/pgstat_internal.h

@@ -626,6 +626,7 @@ extern void pgstat_wal_snapshot_cb(void);
 extern bool pgstat_subscription_flush_cb(PgStat_EntryRef *entry_ref, bool nowait);
 extern void pgstat_subscription_reset_timestamp_cb(PgStatShared_Common *header, TimestampTz ts);
 
+
 /*
  * Functions in pgstat_xact.c
  */