improve docs
diff --git a/gcfg.go b/gcfg.go
index c5d1309..7472877 100644
--- a/gcfg.go
+++ b/gcfg.go
@@ -165,7 +165,7 @@
 // section corresponds to a data field in the section struct.
 // The name of the field must match the name of the section or variable,
 // ignoring case.
-// Hyphens in variable names correspond to underscores in section or field
+// Hyphens in section and variable names correspond to underscores in field
 // names.
 //
 // For sections with subsections, the corresponding field in config must be a