From 1266931d168211f6d933238ca782ce5793191a7d Mon Sep 17 00:00:00 2001
From: David Schwarz <mail+git@davidschwarz.eu>
Date: Mon, 16 Jan 2023 00:02:04 +0100
Subject: [PATCH] v1.0.1

- add example in README.md
- fix typo NegativeResultError->message
- improve tests
- cleanup
---
 .php-cs-fixer.dist.php      | 9 ---------
 README.md                   | 1 +
 src/NegativeResultError.php | 2 +-
 tests/LineTest.php          | 4 ++++
 4 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index 7f80028..9e7b7b7 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -1,14 +1,5 @@
 <?php
 
-/*
- * This file is part of "genug".
- *
- * (c) David Schwarz / Ringsdorf
- * https://davidschwarz.eu
- *
- * License: MIT License
- */
-
 use PhpCsFixer\{
     Config,
     Finder
diff --git a/README.md b/README.md
index 67b860c..456c612 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ $otherLine->equals($startLine); // FALSE
 $otherLine->equals(2);          // TRUE
 
 (string) Line::number(7);       // '7'
+Line::number(7)->i;             // 7
 
 Line::number(-1);               // ...\NegativeValueError
 
diff --git a/src/NegativeResultError.php b/src/NegativeResultError.php
index c0b540d..d668d56 100644
--- a/src/NegativeResultError.php
+++ b/src/NegativeResultError.php
@@ -26,6 +26,6 @@ class NegativeResultError extends Error
     public function __construct(int $a, string $operator, int $b, int $result, ?Throwable $previous = null)
     {
         $computation = ''.$a.$operator.$b;
-        parent::__construct(sprintf('The result "%s of "%s" is less than zero.', $result, $computation), previous: $previous);
+        parent::__construct(sprintf('The result "%s" of "%s" is less than zero.', $result, $computation), previous: $previous);
     }
 }
diff --git a/tests/LineTest.php b/tests/LineTest.php
index 9eb5423..dfae3da 100644
--- a/tests/LineTest.php
+++ b/tests/LineTest.php
@@ -64,6 +64,8 @@ public function testAdd(): void
     {
         $this->assertSame(7, Line::number(5)->add(2)->i);
         $this->assertSame(3, Line::number(5)->add(-2)->i);
+
+        $this->assertSame(7, Line::number(5)->add(Line::number(2))->i);
     }
 
     public function testErrorOnNegativeSum(): void
@@ -76,6 +78,8 @@ public function testSubtract(): void
     {
         $this->assertSame(7, Line::number(9)->subtract(2)->i);
         $this->assertSame(7, Line::number(5)->subtract(-2)->i);
+
+        $this->assertSame(7, Line::number(9)->subtract(Line::number(2))->i);
     }
 
     public function testErrorOnNegativeDifference(): void