peg-lexer: fix help lint

extra/peg-lexer/peg-lexer-docs.factor

@@ -1,14 +1,14 @@
 USING: peg.ebnf help.syntax help.markup strings ;
 IN: peg-lexer
-ABOUT: "peg-lexer"
 
 HELP: ON-BNF:
 { $syntax "ON-BNF: word ... ;ON-BNF" }
 { $description "Creates a parsing word using a parser for lexer control, adding the resulting ast to the stack.  Parser syntax is as in " { $link POSTPONE: EBNF: } } ;
 
 HELP: create-bnf
-{ $values { "word" string } { "parser" parser } }
+{ $values { "name" string } { "parser" parser } }
 { $description "Runtime equivalent of " { $link POSTPONE: ON-BNF: } " also useful with manually constructed parsers." } ;
 
 HELP: factor
+{ $values { "input" string } { "ast" "a sequence of tokens" } }
 { $description "Tokenizer that acts like standard factor lexer, separating tokens by whitespace." } ;