examples: unify the configuration file syntax

examples/aws-asg/main.tf

@@ -40,7 +40,7 @@ resource "aws_autoscaling_group" "web-asg" {
     value = "web-asg"
     propagate_at_launch = "true"
   }
-  }
+}
 
 resource "aws_launch_configuration" "web-lc" {
   name = "terraform-example-lc"

examples/aws-eip/main.tf

@@ -66,4 +66,3 @@ resource "aws_instance" "web" {
     Name = "eip-example"
   }
 }
-

examples/aws-elb/main.tf

@@ -55,10 +55,8 @@ resource "aws_security_group" "elb" {
     protocol = "-1"
     cidr_blocks = ["0.0.0.0/0"]
   }
-  
 }
 
-
 resource "aws_elb" "web" {
   name = "example-elb"