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	tex: move cursor to the first change after undoing :s - neatvi - [fork] simple …
	git clone git://src.adamsgaard.dk/neatvi
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	---
	commit 54a452c55c89f3f3bc1a58741b81f2471c7a9c18
	parent 84fad00b295c1fb13ea3baa0c8267b7aa4b035de
	Author: Kyryl Melekhin <[email protected]>
	Date: Wed, 3 Mar 2021 11:18:33 +0330

	ex: move cursor to the first change after undoing :s

	Diffstat:
	M ex.c \| 12 ++++++++----

	1 file changed, 8 insertions(+), 4 deletions(-)
	---
	diff --git a/ex.c b/ex.c
	t@@ -743,8 +743,10 @@ static int ec_substitute(char *ec)
	}
	for (i = beg; i < end; i++) {
	char *ln = lbuf_get(xb, i);
	- struct sbuf *r = sbuf_make();
	+ struct sbuf *r = NULL;
	while (rset_find(re, ln, LEN(offs) / 2, offs, 0) >= 0) {
	+ if (!r)
	+ r = sbuf_make();
	sbuf_mem(r, ln, offs[0]);
	replace(r, rep, ln, offs);
	ln += offs[1];
	t@@ -753,9 +755,11 @@ static int ec_substitute(char *ec)
	if (offs[1] <= 0) /* zero-length match */
	sbuf_chr(r, (unsigned char) *ln++);
	}
	- sbuf_str(r, ln);
	- lbuf_edit(xb, sbuf_buf(r), i, i + 1);
	- sbuf_free(r);
	+ if (r) {
	+ sbuf_str(r, ln);
	+ lbuf_edit(xb, sbuf_buf(r), i, i + 1);
	+ sbuf_free(r);
	+ }
	}
	rset_free(re);
	free(rep);