feat: pad code on run for better diagnostics

Author: kawre

lua/leetcode-ui/question.lua

@@ -173,10 +173,12 @@ function Question:range()
     return start_i, end_i, lines
 end
 
+---@param submit boolean
 ---@return string
-function Question:lines()
+function Question:lines(submit)
     local start_i, end_i, lines = self:range()
-    return table.concat(lines, "\n", start_i, end_i)
+    local prefix = not submit and ("\n"):rep(start_i - 1) or ""
+    return prefix .. table.concat(lines, "\n", start_i, end_i)
 end
 
 ---@param self lc.ui.Question

lua/leetcode/runner/init.lua

@@ -31,7 +31,7 @@ function Runner:handle(submit)
 
     local body = {
         lang = question.lang,
-        typed_code = self.question:lines(),
+        typed_code = self.question:lines(submit),
         question_id = question.q.id,
         data_input = not submit and table.concat(question.console.testcase:content(), "\n") or nil,
     }