chore: Add coverage-ignore annotations for untestable code

Annotate structurally untestable code paths:
- main(): thin wrapper calling os.Exit via log.Fatal
- run() goroutine loop: blocks forever on <-done
- CmdMatch error branches: CmdMatch never returns errors

Author: lykinsbd

cissh.go

@@ -26,7 +26,7 @@ func run() error {
 	done := make(chan bool, 1)
 
 	// Iterate through the server ports and spawn a Goroutine for each
-	for portNumber := *startingPortPtr; portNumber < numListeners; portNumber++ {
+	for portNumber := *startingPortPtr; portNumber < numListeners; portNumber++ { // coverage-ignore // blocks on <-done
 		go sshlistners.GenericListener(myFakeDevice, portNumber, handlers.GenericCiscoHandler, done)
 	}
 
@@ -35,7 +35,7 @@ func run() error {
 	return nil
 }
 
-func main() {
+func main() { // coverage-ignore
 	if err := run(); err != nil {
 		log.Fatal(err)
 	}

ssh_server/handlers/ciscohandlers.go

@@ -45,7 +45,7 @@ func GenericCiscoHandler(myFakeDevice *fakedevices.FakeDevice) {
 				userInput, myFakeDevice.ContextSearch,
 			)
 			if err != nil {
-				log.Println(err)
+				log.Println(err) // coverage-ignore // CmdMatch never returns errors
 				break
 			}
 
@@ -93,7 +93,7 @@ func GenericCiscoHandler(myFakeDevice *fakedevices.FakeDevice) {
 			// Run userInput through the command matcher to look at supportedCommands
 			match, matchedCommand, multipleMatches, err := utils.CmdMatch(userInput, myFakeDevice.SupportedCommands)
 			if err != nil {
-				log.Println(err)
+				log.Println(err) // coverage-ignore // CmdMatch never returns errors
 				break
 			}