fix typo
Update doc comment
@@ -40,8 +40,8 @@ import (
// IndexWriter serializes the index for a block of series data.
// The methods must be called in the order they are specified in.
type IndexWriter interface {
- // AddSymbols registers all string symbols that are encountered in series
- // and other indices. Symbols must be added in sorted order.
+ // AddSymbol registers a single symbol.
+ // Symbols must be registered in sorted order.
AddSymbol(sym string) error
// AddSeries populates the index writer with a series and its offsets
