fix: improve multiline assignment continuation detection

- Detect continuation lines starting with # (SCL variable references)
- Detect block enders (END_REGION, END_IF, etc.) as new statements
- Fixes multiline assignments with #variable OR continuation pattern

src/formatter.lua

@@ -134,7 +134,12 @@ function M.format_document(content, options)
 
   local function is_assignment_continuation(trimmed)
     if not trimmed then return false end
-    local first_word = trimmed:match("^(%w+)")
+    local first_word
+    if trimmed:match("^#") then
+      first_word = trimmed:match("^#(%w+)")
+    else
+      first_word = trimmed:match("^(%w+)")
+    end
     if first_word and CONTINUATION_OPERATORS[first_word:upper()] then
       return true
     end
@@ -334,15 +339,21 @@ function M.format_document(content, options)
 
     -- Check if continuing assignment
     -- Continuation if: in assignment AND (starts with operator OR doesn't start new statement)
-    -- BUT NOT if this line ends an assignment
+    -- BUT NOT if this line ends an assignment OR starts a new assignment (contains :=) OR starts with block ender
     if in_assignment and not ends_assignment then
       local starts_with_operator = is_assignment_continuation(trimmed)
-      local is_new_statement = trimmed:match("^%w+") and (
+      -- New statement if: starts with keyword OR contains := (new assignment) OR starts with block ender
-        trimmed:match(":=") or 
+      local first_word = trimmed:match("^([%w_]+)")
-        BLOCKS[trimmed:match("^([%w_]+)")] or 
+      local starts_block_ender = first_word and (
+        trimmed:match("^END_") or 
+        BLOCKS[first_word] ~= nil
+      )
+      local is_new_statement = trimmed:match(":=") or starts_block_ender or (
+        trimmed:match("^%w+") and (
           SAME_LEVEL[trimmed:match("^([%w_]+)")] or
           VAR_KEYWORDS[trimmed:match("^([%w_]+)")]
         )
+      )
       if starts_with_operator or not is_new_statement then
         table.insert(formatted_lines, assignment_continuation_indent .. trimmed)
         goto continue