nit(programs/platform.h): replace Unicode character #1018
On line 83, U+2013 was replaced with U+002D in order to improve compatibility with MSVC 2019 and older compilers.
diff --git a/programs/platform.h b/programs/platform.h
index abcd67b..43a171b 100644
--- a/programs/platform.h
+++ b/programs/platform.h
@@ -80,7 +80,7 @@
************************************************************** */
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__)) /* UNIX-like OS */ \
|| defined(__midipix__) || defined(__VMS))
-# if (defined(__APPLE__) && defined(__MACH__)) || defined(__SVR4) || defined(_AIX) || defined(__hpux) /* POSIX.1–2001 (SUSv3) conformant */ \
+# if (defined(__APPLE__) && defined(__MACH__)) || defined(__SVR4) || defined(_AIX) || defined(__hpux) /* POSIX.1-2001 (SUSv3) conformant */ \
|| defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__MidnightBSD__) /* BSD distros */ \
|| defined(__HAIKU__)
# define PLATFORM_POSIX_VERSION 200112L