fix: (Combined) unmerge-able block shouldn't be repeated

Signed-off-by: Jack Cherng <jfcherng@gmail.com>

Author: jfcherng

src/Renderer/Html/Combined.php

@@ -239,7 +239,7 @@ protected function renderTableBlockReplace(array $block): string
                     $this->renderTableBlockDelete($block) .
                     $this->renderTableBlockInsert($block);
 
-                continue;
+                break;
             }
 
             $ret .= $this->renderTableRow('rep', SequenceMatcher::OP_REP, $mergedLine);

tests/Renderer/Html/CombinedTest.php

@@ -45,4 +45,27 @@ public function testHtmlEscapeForOpEq(): void
         static::assertStringNotContainsString('<tag>', $result);
         static::assertStringNotContainsString('</tag>', $result);
     }
+
+    /**
+     * Test unmerge-able block.
+     *
+     * @see https://github.com/jfcherng/php-diff/issues/69
+     */
+    public function testSimpleUnmergeableBlock(): void
+    {
+        $result = DiffHelper::calculate("111\n222\n333\n", "444\n555\n666\n", 'Combined');
+
+        static::assertSame(
+            [1, 1, 1, 1, 1, 1],
+            [
+                substr_count($result, '111'),
+                substr_count($result, '222'),
+                substr_count($result, '333'),
+                substr_count($result, '444'),
+                substr_count($result, '555'),
+                substr_count($result, '666'),
+            ],
+            "Unmerge-able block shouldn't be repeated.",
+        );
+    }
 }