Change conditional check in disk_free_space() test

As the notion of free space is fuzzy on some filesystems (such as BTRFS)
we check that the disk space after adding a file is less or equal than before

This closes Bug #80629

Author: Girgias

ext/standard/tests/file/disk_free_space_basic.phpt

@@ -17,7 +17,7 @@ var_dump( diskfreespace($file_path) );
 echo "*** Testing with newly created directory ***\n";
 $dir = "/disk_free_space";
 mkdir($file_path.$dir);
-echo" \n Free Space before writing to a file\n";
+echo "\n Free Space before writing to a file\n";
 $space1 =  disk_free_space($file_path.$dir);
 var_dump( $space1 );
 
@@ -30,7 +30,8 @@ echo "\n Free Space after writing to a file\n";
 $space2 =  disk_free_space($file_path.$dir);
 var_dump( $space2 );
 
-if($space1 > $space2 )
+// Some file systems (like BTRFS) have a fuzzy notion of "free space" and will thus claim the same amount of free space
+if ($space1 >= $space2)
   echo "\n Free Space Value Is Correct\n";
 else {
   echo "\n Free Space Value Is Incorrect\n";
@@ -53,7 +54,7 @@ rmdir($file_path."/disk_free_space");
 float(%f)
 float(%f)
 *** Testing with newly created directory ***
- 
+
  Free Space before writing to a file
 float(%f)