Fix typos

examples/core/extempore_lang.xtm

@@ -217,7 +217,7 @@
 ;; which scheme stores as a generic cptr
 (define myf (my-inc-maker 0))
 
-;; and we can call my-in-maker-wrapper
+;; and we can call my-inc-maker-wrapper
 ;; to appy myf
 (println (my-inc-maker-wrapper myf 1)) ; 1
 (println (my-inc-maker-wrapper myf 1)) ; 2

libs/core/instruments-scm.xtm

@@ -221,7 +221,7 @@
 (bind-macro
   "xtlang play macro
 
-for use with native beat shceduler"
+for use with native beat scheduler"
   (play . args)
   (let ((ns 0)
         (instargs '()))

tests/core/xtlang.xtm

@@ -144,7 +144,7 @@
               (f x)))
          (incrementer-test2 myf 1) 1)
 
-;; and we can call my-in-maker-wrapper
+;; and we can call my-inc-maker-wrapper
 ;; to appy myf
 (xtmtest-result (incrementer-test2 myf 1) 2)
 (xtmtest-result (incrementer-test2 myf 1) 3)