README.adoc: proofreading

README.adoc

@@ -58,6 +58,8 @@ A few examples to get started.
 
 [source,go]
 ----
+package main
+
 import (
 	"fmt"
 	"strings"
@@ -213,7 +215,7 @@ Currently, boolean operations are evaluated using _short cut evaluation_. This m
 #TODO: List operations#
 
 === Variables
-#TODO: List operations#
+#TODO: variables#
 
 === Other operations
 
@@ -307,13 +309,13 @@ The table below shows all supported operators by decreasing priorities.
 === Functions
 
 ==== Function calls
-#TODO: List operations#
+#TODO: function calls operations#
 
 ==== Function definitions
-#TODO: List operations#
+#TODO: function definitions operations#
 
 ==== Builtins
-#TODO: List operations#
+#TODO: builtins#