Do I want to support expend environment?

config/config.go

@@ -65,9 +65,13 @@ type SourceConfig struct {
 
 	// ExpandEnvironment specifies a list of install file paths that when
 	// installed should have bash style parameter expansion done for
-	// environment parables. These generally look like: ${HOME}. This
+	// environment variables. These generally look like: ${HOME}. This
 	// configuration is useful for config files that do not support environment
 	// variable expansion.
+	//
+	// TODO: Decide if this is actually something we want to implement. It
+	//       makes diffing a bit harder since we can't straight compare the
+	//       file size for single files anymore.
 	ExpandEnvironment []string `yaml:"expand_environment"`
 }