add export comments

config/environment.go

@@ -38,7 +38,10 @@ type Environment interface {
 	// then it will be returned wholesale.
 	Int(key string, def int) (val int)
 
+	// All returns a copy of all the key/value pairs for the current environment.
 	All() map[string]string
+
+	// deprecated, don't use
 	set(key, value string)
 	del(key string)
 }

config/fetcher.go

@@ -8,9 +8,10 @@ type Fetcher interface {
 	// determining if the key exists.
 	Get(key string) (val string, ok bool)
 
+	// All returns a copy of all the key/value pairs for the current environment.
 	All() map[string]string
 
+	// deprecated, don't use
 	set(key, value string)
-
 	del(key string)
 }

config/git_environment.go

@@ -37,6 +37,7 @@ func (g *gitEnvironment) Int(key string, def int) (val int) {
 	return g.git.Int(key, def)
 }
 
+// All returns a copy of all the key/value pairs for the current git config.
 func (g *gitEnvironment) All() map[string]string {
 	g.loadGitConfig()