Fix ALPHA-CHAR-P for capital letters

diff --git a/src/boot.lisp b/src/boot.lisp
index 72c43cb..44587f2 100644 (file)
--- a/src/boot.lisp
+++ b/src/boot.lisp
@@ -386,7 +386,7 @@
 
 (defun alpha-char-p (x)
   (or (<= (char-code #\a) (char-code x) (char-code #\z))
-      (<= (char-code #\Z) (char-code x) (char-code #\Z))))
+      (<= (char-code #\A) (char-code x) (char-code #\Z))))
 
 (defun digit-char-p (x)
   (if (and (<= (char-code #\0) (char-code x) (char-code #\9)))