fix guide typos

closes PR 10577

collects/scribblings/guide/define.scrbl

@@ -217,7 +217,7 @@ so the following are valid instances of the grammar:
 
 (lambda (f)                (code:comment @#,elem{one definition})
   (define (log-it what)
-    (printf "~a\n"))
+    (printf "~a\n" what))
   (log-it "running")
   (f 0)
   (log-it "done"))
@@ -228,11 +228,11 @@ so the following are valid instances of the grammar:
         (log-it "done")
         (begin
           (log-it "running")
-          (f 0)
+          (f n)
           (call (- n 1)))))
   (define (log-it what)
-    (printf "~a\n"))
-  (call f n))
+    (printf "~a\n" what))
+  (call n))
 ]
 
 Internal definitions in a particular @racket[_body] sequence are

collects/scribblings/guide/hash-tables.scrbl

@@ -40,7 +40,7 @@ A literal immutable hash table can be written as an expression by using
 @litchar{#hasheqv} (for an @scheme[eqv?]-based table), or
 @litchar{#hasheq} (for an @scheme[eq?]-based table). A parenthesized
 sequence must immediately follow @litchar{#hash}, @litchar{#hasheq},
-or @litchar{#hasheqv}, where each element is a sequence is a dotted
+or @litchar{#hasheqv}, where each element is a dotted
 key--value pair. The @litchar{#hash}, etc. forms implicitly
 @scheme[quote] their key and value sub-forms.
 

collects/scribblings/guide/lists.scrbl

@@ -286,7 +286,7 @@ It turns out that if you write
     (f i)))
 ]
 
-then the @racket[for/list] form in the function both is expanded to
+then the @racket[for/list] form in the function is expanded to
 essentially the same code as the @racket[iter] local definition and
 use. The difference is merely syntactic convenience.