config: fix minor comment errors

config/interpolate_funcs.go

@@ -73,8 +73,8 @@ func interpolationFuncFile() ast.Function {
 	}
 }
 
-// interpolationFuncFormat implements the "replace" function that does
-// string replacement.
+// interpolationFuncFormat implements the "format" function that does
+// string formatting.
 func interpolationFuncFormat() ast.Function {
 	return ast.Function{
 		ArgTypes:     []ast.Type{ast.TypeString},

config/interpolate_walk.go

@@ -11,8 +11,7 @@ import (
 )
 
 // InterpSplitDelim is the delimeter that is looked for to split when
-// it is returned. This is a comma right now but should eventually become
-// a value that a user is very unlikely to use (such as UUID).
+// it is returned.
 const InterpSplitDelim = `B780FFEC-B661-4EB8-9236-A01737AD98B6`
 
 // interpolationWalker implements interfaces for the reflectwalk package