nano

commit 9f6c3a6269cc7a4bc754a3ca4d1252c0a5c9c664
parent 62737687972bac7b9888820dd407f5ff073542eb
Author: Benno Schulenberg <bensberg@telfort.nl>
Date:   Mon, 14 Aug 2017 11:39:29 +0200

display: don't doubly show tabs that cross a chunk boundary

This fixes https://savannah.gnu.org/bugs/?51669.
Reported-by: David Lawrence Ramsey <pooka109@gmail.com>

Diffstat:
M
src/winio.c
 | 
3
++-

1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/winio.c b/src/winio.c
@@ -1906,7 +1906,8 @@ char *display_string(const char *buf, size_t column, size_t span, bool isdata)
 	} else if (*buf == '\t') {
 	    /* Show a tab as a visible character, or as as a space. */
 #ifndef NANO_TINY
-	    if (ISSET(WHITESPACE_DISPLAY)) {
+	    if (ISSET(WHITESPACE_DISPLAY) && (index > 0 || !isdata ||
+			!ISSET(SOFTWRAP) || column % tabsize == 0)) {
 		int i = 0;
 
 		while (i < whitespace_len[0])