patch 9.0.1602: stray character visible if marker on top of double-wide char Commit: https://github.com/vim/vim/commit/ecb87dd7d3f7b9291092a7dd8fae1e59b9903252 Author: zeertzjq <zeertzjq@outlook.com> Date: Sat Jun 3 19:45:06 2023 +0100 patch 9.0.1602: stray character visible if marker on top of double-wide char Problem: Stray character is visible if 'smoothscroll' marker is displayed on top of a double-wide character. Solution: When overwriting a double-width character with the 'smoothscroll' marker clear the second half. (closes #12469)

/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

#ifdef __QNXNTO__
# include <sys/procmgr.h>
#endif

#define	USE_TMPNAM

#define POSIX	    // Used by pty.c

#if defined(FEAT_GUI_PHOTON)
extern int is_photon_available;
#endif