From a2658250fc12f7b1d55978afa3774dd8263955c9 Mon Sep 17 00:00:00 2001
From: jaggededgedjustice <jaggededgedjustice@gmail.com>
Date: Wed, 5 May 2021 22:12:17 +0100
Subject: [PATCH] Fix fmt crashing on subtracting unsigned numbers (#2178)

---
 src/uu/fmt/src/linebreak.rs |  2 +-
 tests/by-util/test_fmt.rs   | 14 ++++++--------
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/src/uu/fmt/src/linebreak.rs b/src/uu/fmt/src/linebreak.rs
index 50cb6f77f..fe9f8568e 100644
--- a/src/uu/fmt/src/linebreak.rs
+++ b/src/uu/fmt/src/linebreak.rs
@@ -296,7 +296,7 @@ fn find_kp_breakpoints<'a, T: Iterator<Item = &'a WordInfo<'a>>>(
                         (0, 0.0)
                     } else {
                         compute_demerits(
-                            (args.opts.goal - tlen) as isize,
+                            args.opts.goal as isize - tlen as isize,
                             stretch,
                             w.word_nchars as isize,
                             active.prev_rat,
diff --git a/tests/by-util/test_fmt.rs b/tests/by-util/test_fmt.rs
index 21a5f3396..a83fae58e 100644
--- a/tests/by-util/test_fmt.rs
+++ b/tests/by-util/test_fmt.rs
@@ -33,18 +33,16 @@ fn test_fmt_w_too_big() {
         "fmt: error: invalid width: '2501': Numerical result out of range"
     );
 }
-/* #[test]
- Fails for now, see https://github.com/uutils/coreutils/issues/1501
+#[test]
 fn test_fmt_w() {
     let result = new_ucmd!()
         .arg("-w")
         .arg("10")
         .arg("one-word-per-line.txt")
         .run();
-        //.stdout_is_fixture("call_graph.expected");
-    assert_eq!(result.stdout_str().trim(), "this is a file with one word per line");
+    //.stdout_is_fixture("call_graph.expected");
+    assert_eq!(
+        result.stdout_str().trim(),
+        "this is\na file\nwith one\nword per\nline"
+    );
 }
-
-
-fmt is pretty broken in general, needs more works to have more tests
- */