pretty print of error messages

Author: vearutop

src/Helper.php

@@ -66,4 +66,18 @@ public static function resolveURI($parent, $current)
     }
 
 
+    public static function padLines($with, $text, $skipFirst = true)
+    {
+        $lines = explode("\n", $text);
+        foreach ($lines as $index => $line) {
+            if ($skipFirst && !$index) {
+                continue;
+            }
+            if ($line) {
+                $lines[$index] = $with . $line;
+            }
+        }
+        return implode("\n", $lines);
+    }
+
 }

src/Schema.php

@@ -212,7 +212,7 @@ public function process($data, Context $options, $path = '#', $result = null)
                         break;
                     }
                 } catch (InvalidValue $exception) {
-                    $failures .= ' ' . $index . ': ' . $exception->getMessage() . "\n";
+                    $failures .= ' ' . $index . ': ' . Helper::padLines(' ', $exception->getMessage()) . "\n";
                     // Expected exception
                 }
             }
@@ -240,7 +240,7 @@ public function process($data, Context $options, $path = '#', $result = null)
                 }
             }
             if (!$successes) {
-                $this->fail(new LogicException('Failed due to logical constraint: no valid results for anyOf {' . "\n" . substr($failures, 0, -1) . "\n}"), $path);
+                $this->fail(new LogicException('Failed due to logical constraint: no valid results for anyOf {' . "\n" . substr(Helper::padLines(' ', $failures), 0, -1) . "\n}"), $path);
             }
         }