update some tests to pass on windows. (#1037)

namely:
	fail/pr13289.rkt
	succeed/simple-kw-ap.rkt
	optimizer/test/known-length-vector-op.rkt

Author: bdeket

typed-racket-test/fail/pr13289.rkt

@@ -1,5 +1,5 @@
 #;
-(exn-pred #rx"fail/pr13289.rkt:9:10:.*in: Natural")
+(exn-pred #rx"fail.pr13289.rkt:9:10:.*in: Natural")
 #lang typed/racket
 
 ;; This test ensures that the error message for misuse of

typed-racket-test/optimizer/run.rkt

@@ -9,7 +9,7 @@
          generate-log tests-dir missed-optimizations-dir)
 
 (define (get-expected-results file)
-  (with-input-from-file file
+  (with-input-from-file file #:mode 'text
     (lambda () ; from the test file
       (read-line) ; skip the #;#;
       (values (for/list ((l (in-lines (open-input-string (read))))) l)

typed-racket-test/succeed/simple-kw-app.rkt

@@ -1,8 +1,11 @@
 #lang typed/racket
 
-((values file->string) "/dev/null" #:mode 'binary)
-(file->string "/dev/null" #:mode 'text)
+(define filename (collection-file-path "simple-kw-app.rkt"
+                                       "typed-racket-test"
+                                       "succeed"))
+((values file->string) filename #:mode 'binary)
+(file->string filename #:mode 'text)
 
 file->value file->bytes
 
-(file->lines #:mode 'text #:line-mode 'linefeed "/dev/null")
+(file->lines #:mode 'text #:line-mode 'linefeed filename)