eth: fix typos and outdated comments (ethereum#32324)

Author: tomasandroil

eth/ethconfig/config.go

@@ -189,7 +189,7 @@ type Config struct {
 	// RPCEVMTimeout is the global timeout for eth-call.
 	RPCEVMTimeout time.Duration
 
-	// RPCTxFeeCap is the global transaction fee(price * gaslimit) cap for
+	// RPCTxFeeCap is the global transaction fee (price * gas limit) cap for
 	// send-transaction variants. The unit is ether.
 	RPCTxFeeCap float64
 

eth/filters/filter.go

@@ -464,7 +464,6 @@ func (f *Filter) blockLogs(ctx context.Context, header *types.Header) ([]*types.
 
 // checkMatches checks if the receipts belonging to the given header contain any log events that
 // match the filter criteria. This function is called when the bloom filter signals a potential match.
-// skipFilter signals all logs of the given block are requested.
 func (f *Filter) checkMatches(ctx context.Context, header *types.Header) ([]*types.Log, error) {
 	hash := header.Hash()
 	// Logs in cache are partially filled with context data

eth/filters/filter_system.go

@@ -223,7 +223,7 @@ type EventSystem struct {
 }
 
 // NewEventSystem creates a new manager that listens for event on the given mux,
-// parses and filters them. It uses the all map to retrieve filter changes. The
+// parses and filters them. It uses an internal map to retrieve filter changes. The
 // work loop holds its own index that is used to forward events to filters.
 //
 // The returned manager has a loop that needs to be stopped with the Stop function