fix: correct error output

src/Markitdown.php

@@ -30,7 +30,7 @@ public function convert(string $filename): string
             ->run();
 
         if (! $processResult->successful()) {
-            throw MarkitdownException::processFailed('markitdown', $processResult->output());
+            throw MarkitdownException::processFailed('markitdown', $processResult->errorOutput());
         }
 
         return $processResult->output();
@@ -44,7 +44,7 @@ public function convertString(string $content): string
             ->run();
 
         if (! $processResult->successful()) {
-            throw MarkitdownException::processFailed('markitdown', $processResult->output());
+            throw MarkitdownException::processFailed('markitdown', $processResult->errorOutput());
         }
 
         return $processResult->output();

tests/.pest/snapshots/MarkitdownTest/it_can_convert_from_string.snap

@@ -0,0 +1,9 @@
+
+# Take Notes
+
+* To take notes, just tap here and start typing.
+* Or, easily create a digital notebook for all your notes that automatically syncs across your devices, using the free OneNote app.
+
+## To learn more and get OneNote, visit [www.onenote.com](http://go.microsoft.com/fwlink/?LinkID=523891).
+
+

tests/MarkitdownTest.php

@@ -2,6 +2,7 @@
 
 declare(strict_types=1);
 
+use Innobrain\Markitdown\Exceptions\MarkitdownException;
 use Innobrain\Markitdown\Facades\Markitdown;
 
 it('can execute markitdown', function (): void {
@@ -21,3 +22,7 @@
 
     expect($conv)->toMatchSnapshot();
 });
+
+it('throws exception with error output when process fails', function (): void {
+    Markitdown::convert('non_existent_file.docx');
+})->throws(MarkitdownException::class, 'The command `markitdown` failed with output: Traceback (most recent call last):');