refactor!: dont add unnecessary empty lines

lua/gopher/_utils/init.lua

@@ -30,4 +30,16 @@ function utils.readfile_joined(path)
   return table.concat(vim.fn.readfile(path), "\n")
 end
 
+---@param t string[]
+---@return string[]
+function utils.remove_empty_lines(t)
+  local res = {}
+  for _, line in ipairs(t) do
+    if line ~= "" then
+      table.insert(res, line)
+    end
+  end
+  return res
+end
+
 return utils

lua/gopher/iferr.lua

@@ -30,7 +30,7 @@ function iferr.iferr()
     error("iferr failed: " .. rs.stderr)
   end
 
-  vim.fn.append(pos, vim.split(rs.stdout, "\n"))
+  vim.fn.append(pos, u.remove_empty_lines(vim.split(rs.stdout, "\n")))
   vim.cmd [[silent normal! j=2j]]
   vim.fn.setpos(".", pos)
 end

lua/gopher/impl.lua

@@ -88,7 +88,7 @@ function impl.impl(...)
   end
 
   local pos = vim.fn.getcurpos()[2]
-  local output = vim.split(rs.stdout, "\n")
+  local output = u.remove_empty_lines(vim.split(rs.stdout, "\n"))
 
   table.insert(output, 1, "")
   vim.fn.append(pos, output)

spec/fixtures/impl/closer_output.go

@@ -5,4 +5,3 @@ type CloserTest2 struct{}
 func (closertest *CloserTest2) Close() error {
 	panic("not implemented") // TODO: Implement
 }
-

spec/fixtures/impl/reader_output.go

@@ -4,5 +4,4 @@ func (r Read2) Read(p []byte) (n int, err error) {
 	panic("not implemented") // TODO: Implement
 }
 
-
 type Read2 struct{}

spec/fixtures/impl/writer_output.go

@@ -5,4 +5,3 @@ type WriterTest2 struct{}
 func (w *WriterTest2) Write(p []byte) (n int, err error) {
 	panic("not implemented") // TODO: Implement
 }
-