enhance: data/table: add comment

data/table/read.go

@@ -70,7 +70,7 @@ func ReadFileSimple(path string, sep string, hasHeader, trimSpace bool) (Table,
 */
 
 // ReadFiles reads in a list of delimited files and returns a merged `Table` struct.
-// An 
+// An error is returned if the columns count differs between files.
 func ReadFiles(filenames []string, comma rune, hasHeader, stripBom bool) (Table, error) {
 	tbl := NewTable()
 	for i, filename := range filenames {