@@ -134,7 +134,9 @@ type StringList []string

 type StringOrNumberList []string

 // MappingWithEquals is a mapping type that can be converted from a list of

-// key=value strings

+// key[=value] strings.

+// For the key with an empty value (`key=`), the mapped value is set to a pointer to `""`.

+// For the key without value (`key`), the mapped value is set to nil.

 type MappingWithEquals map[string]*string

 // Labels is a mapping type for labels