Pretty diff design.

Author: janbarasek

src/SimpleDiff.php

@@ -17,14 +17,15 @@ public function compare(string $left, string $right, bool $strict = false): Diff
 		$return = [];
 		$from = explode("\n", $left);
 		$to = explode("\n", $right);
+		$padLength = strlen((string) max(count($from), count($to)));
 		$changedLines = [];
 
 		for ($i = 0; isset($from[$i]); $i++) {
 			$original = $from[$i] ?? '';
 			$target = $to[$i] ?? '';
-			$lineNumber = str_pad(($i + 1) . ':', 6, ' ') . ' ';
+			$lineNumber = str_pad((string) ($i + 1), $padLength, ' ', STR_PAD_LEFT) . '| ';
 			if ($original === $target) {
-				$return[] = $lineNumber . '  ' . $original;
+				$return[] = '  ' . $lineNumber . $original;
 			} else {
 				$return[] = '- ' . $lineNumber . $this->prettyRender($original);
 				$return[] = '+ ' . $lineNumber . $this->prettyRender($target);