From de5cb4fa52f50e915ff90ccfec2eafc0923dde7f Mon Sep 17 00:00:00 2001
From: rxi <rxi@users.noreply.github.com>
Date: Sun, 27 Sep 2020 15:03:01 +0100
Subject: [PATCH] Improved behaviour of `doc:join-lines` when joining to empty
 line

---
 data/core/commands/doc.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/data/core/commands/doc.lua b/data/core/commands/doc.lua
index 1afd546..0a4ee42 100644
--- a/data/core/commands/doc.lua
+++ b/data/core/commands/doc.lua
@@ -160,7 +160,9 @@ local commands = {
     local line1, _, line2 = doc():get_selection(true)
     if line1 == line2 then line2 = line2 + 1 end
     local text = doc():get_text(line1, 1, line2, math.huge)
-    text = text:gsub("\n[\t ]*", " ")
+    text = text:gsub("(.-)\n[\t ]*", function(x)
+      return x:find("^%s*$") and x or x .. " "
+    end)
     doc():insert(line1, 1, text)
     doc():remove(line1, #text + 1, line2, math.huge)
     if doc():has_selection() then