refactor(pdf_parse): adjust line calculation for block height

- Remove unnecessary addition of 1 when calculating lines for block height
- This change affects the logic for both potential double-column and triple-column structures

magic_pdf/pdf_parse_union_core_v2.py

@@ -452,14 +452,14 @@ def insert_lines_into_block(block_bbox, line_height, page_w, page_h):
         if (
             block_height > page_h * 0.25 and page_w * 0.5 > block_weight > page_w * 0.25
         ):  # 可能是双列结构，可以切细点
-            lines = int(block_height / line_height) + 1
+            lines = int(block_height / line_height)
         else:
             # 如果block的宽度超过0.4页面宽度，则将block分成3行(是一种复杂布局，图不能切的太细)
             if block_weight > page_w * 0.4:
                 lines = 3
                 line_height = (y1 - y0) / lines
             elif block_weight > page_w * 0.25:  # （可能是三列结构，也切细点）
-                lines = int(block_height / line_height) + 1
+                lines = int(block_height / line_height)
             else:  # 判断长宽比
                 if block_height / block_weight > 1.2:  # 细长的不分
                     return [[x0, y0, x1, y1]]