# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1576617304 -3600
# Node ID 4c0b420e73270138ad3b93cc69abf03e4ebaf4df
# Parent  35d2ab3c4ff673f63b0d825a8a8181df73b474bc
patch 8.2.0018: :join does not add white space where it should

Commit: https://github.com/vim/vim/commit/91b65e49440e77222a65b6f868507453239f409b
Author: Bram Moolenaar <Bram@vim.org>
Date:   Tue Dec 17 22:10:58 2019 +0100

    patch 8.2.0018: :join does not add white space where it should

    Problem:    :join does not add white space where it should. (Zdenek Dohnal)
    Solution:   Handle joining multiple lines propely.

diff --git a/src/ops.c b/src/ops.c
--- a/src/ops.c
+++ b/src/ops.c
@@ -2001,7 +2001,7 @@ do_join(
 	{
 	    curr = skipwhite(curr);
 	    if (*curr != NUL && *curr != ')'
-		    && currsize != 0 && endcurr1 != TAB
+		    && sumsize != 0 && endcurr1 != TAB
 		    && (!has_format_option(FO_MBYTE_JOIN)
 			|| (mb_ptr2char(curr) < 0x100 && endcurr1 < 0x100))
 		    && (!has_format_option(FO_MBYTE_JOIN2)
diff --git a/src/testdir/test_join.vim b/src/testdir/test_join.vim
--- a/src/testdir/test_join.vim
+++ b/src/testdir/test_join.vim
@@ -427,3 +427,14 @@ int i = 7 /* foo *// 3
   call assert_equal(expected, getline(1, '$'))
   close!
 endfunc
+
+func Test_join_lines()
+  new
+  call setline(1, ['a', 'b', '', 'c', 'd'])
+  %join
+  call assert_equal('a b c d', getline(1))
+  call setline(1, ['a', 'b', '', 'c', 'd'])
+  normal 5J
+  call assert_equal('a b c d', getline(1))
+  bwipe!
+endfunc
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    18,
+/**/
     17,
 /**/
     16,