bug #28548 [Console] Fixed boxed table style with colspan (ro0NL)

This PR was merged into the 2.8 branch.

Discussion
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[Console] Fixed boxed table style with colspan

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | no
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | #28532
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

Commits
-------

a67ff2a2d6 [Console] Fixed boxed table style with colspan

src/Symfony/Component/Console/Helper/Table.php

@@ -570,7 +570,7 @@ class Table
                 $lengths[] = $this->getCellWidth($row, $column);
             }
 
-            $this->columnWidths[$column] = max($lengths) + \strlen($this->style->getCellRowContentFormat()) - 2;
+            $this->columnWidths[$column] = max($lengths) + Helper::strlen($this->style->getCellRowContentFormat()) - 2;
         }
     }
 
@@ -581,7 +581,7 @@ class Table
      */
     private function getColumnSeparatorWidth()
     {
-        return \strlen(sprintf($this->style->getBorderFormat(), $this->style->getVerticalBorderChar()));
+        return Helper::strlen(sprintf($this->style->getBorderFormat(), $this->style->getVerticalBorderChar()));
     }
 
     /**

src/Symfony/Component/Console/Tests/Helper/TableTest.php

@@ -745,6 +745,42 @@ TABLE;
         Table::getStyleDefinition('absent');
     }
 
+    public function testBoxedStyleWithColspan()
+    {
+        $boxed = new TableStyle();
+        $boxed
+            ->setHorizontalBorderChar('─')
+            ->setVerticalBorderChar('│')
+            ->setCrossingChar('┼')
+        ;
+
+        $table = new Table($output = $this->getOutputStream());
+        $table->setStyle($boxed);
+        $table
+            ->setHeaders(array('ISBN', 'Title', 'Author'))
+            ->setRows(array(
+                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
+                new TableSeparator(),
+                array(new TableCell('This value spans 3 columns.', array('colspan' => 3))),
+            ))
+        ;
+        $table->render();
+
+        $expected =
+            <<<TABLE
+┼───────────────┼───────────────┼─────────────────┼
+│ ISBN          │ Title         │ Author          │
+┼───────────────┼───────────────┼─────────────────┼
+│ 99921-58-10-7 │ Divine Comedy │ Dante Alighieri │
+┼───────────────┼───────────────┼─────────────────┼
+│ This value spans 3 columns.                     │
+┼───────────────┼───────────────┼─────────────────┼
+
+TABLE;
+
+        $this->assertSame($expected, $this->getOutputContent($output));
+    }
+
     protected function getOutputStream($decorated = false)
     {
         return new StreamOutput($this->stream, StreamOutput::VERBOSITY_NORMAL, $decorated);