gnu: lib2geom: Fix more tests.

There were still two tests failing on aarch64-linux:

1. rotated-rect-test,
2. ellipse-test.

The first one was removed along with the RotatedRect class in latest upstream,
while the second one is yet numerical accuracy related.  It gets fixed by
updating the already existing 'lib2geom-fix-tests' patch.

* gnu/packages/graphics.scm (lib2geom): Bump revision to "2", and update
commit hash to the latest one available.
* gnu/packages/patches/lib2geom-fix-tests.patch: Update patch.

gnu/packages/graphics.scm

@@ -389,8 +389,8 @@ (define-public ilmbase
 
 (define-public lib2geom
   ;; Use the latest master commit, as the 1.0 release suffer build problems.
-  (let ((revision "1")
-        (commit "42e119d94934a9514c61571cfb6b4af503ece082"))
+  (let ((revision "2")
+        (commit "f98256d2a923955af74b8cff3d456f0df1ee4b59"))
     (package
       (name "lib2geom")
       (version (git-version "1.0" revision commit))
@@ -402,7 +402,7 @@ (define-public lib2geom
                 (file-name (git-file-name name version))
                 (sha256
                  (base32
-                  "195rs0kdbs8w62irha1nwy83bccz04wglmk578qrj1mky7fc4rjv"))
+                  "0w6ijaai8i80d0f35c0shgdspqlsdhw3cvz106k1gm7bmnz1wzpq"))
                 (patches
                  ;; Patches submitted to upstream (see:
                  ;; https://gitlab.com/inkscape/lib2geom/merge_requests/17,

gnu/packages/patches/lib2geom-fix-tests.patch

-From 488edbf84e918e0353e7a8f438abbf6eeca3767e Mon Sep 17 00:00:00 2001
+From 3e858cc87f2f8b7dc514a8ad7709c1f47f1f4cde Mon Sep 17 00:00:00 2001
 From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
 Date: Wed, 17 Jun 2020 23:20:53 -0400
 Subject: [PATCH] tests: Fix tests on non-x86_64 platforms.
 
 On platform other than x86_64 such as aarch64-linux or i686-linux,
-some double comparison would fail.
+some double comparisons would fail.
 
 See <http://issues.guix.gnu.org/41827>.
 
@@ -14,6 +14,7 @@ EXPECT_near.
 (Portion): Replace EXPECT_EQ by EXPECT_near.
 * tests/ellipse-test.cpp (BezierIntersection): Lower error tolerance
 from 6e-13 to 6e-12.
+(LineIntersection): Replace EXPECT_DOUBLE_EQ by EXPECT_NEAR.
 * tests/line-test.cpp (Reflection): Replace EXPECT_FLOAT_EQ BY
 EXPECT_near.
 (Coefficients): Skip test.
@@ -21,13 +22,13 @@ EXPECT_near.
 EXPECT_DOUBLE_EQ.
 ---
  tests/bezier-test.cpp        | 31 +++++++++++++++++--------------
- tests/ellipse-test.cpp       |  2 +-
+ tests/ellipse-test.cpp       | 11 ++++++-----
  tests/line-test.cpp          | 11 +++++++----
  tests/parallelogram-test.cpp |  8 ++++----
- 4 files changed, 29 insertions(+), 23 deletions(-)
+ 4 files changed, 34 insertions(+), 27 deletions(-)
 
 diff --git a/tests/bezier-test.cpp b/tests/bezier-test.cpp
-index 4054a65..46209f4 100644
+index 4054a654..46209f40 100644
 --- a/tests/bezier-test.cpp
 +++ b/tests/bezier-test.cpp
 @@ -152,11 +152,13 @@ TEST_F(BezierTest, Casteljau) {
@@ -104,10 +105,29 @@ index 4054a65..46209f4 100644
      }
  }
 diff --git a/tests/ellipse-test.cpp b/tests/ellipse-test.cpp
-index 561c285..d6e65d8 100644
+index 561c285a..8e4de12c 100644
 --- a/tests/ellipse-test.cpp
 +++ b/tests/ellipse-test.cpp
-@@ -199,7 +199,7 @@ TEST(EllipseTest, BezierIntersection) {
+@@ -158,13 +158,14 @@ TEST(EllipseTest, LineIntersection) {
+     std::vector<ShapeIntersection> xs = e.intersect(l);
+ 
+     ASSERT_EQ(xs.size(), 2ul);
+-    EXPECT_FLOAT_EQ(xs[0].point()[X], 0);
+-    EXPECT_FLOAT_EQ(xs[0].point()[Y], -2);
+-    EXPECT_FLOAT_EQ(xs[1].point()[X], 9./5);
+-    EXPECT_FLOAT_EQ(xs[1].point()[Y], 8./5);
+ 
+     // due to numeric imprecision when evaluating Ellipse,
+     // the points may deviate by around 2e-16
++    EXPECT_NEAR(xs[0].point()[X], 0, 1e-15);
++    EXPECT_NEAR(xs[0].point()[Y], -2, 1e-15);
++    EXPECT_NEAR(xs[1].point()[X], 9./5, 1e-15);
++    EXPECT_NEAR(xs[1].point()[Y], 8./5, 1e-15);
++
+     EXPECT_intersections_valid(e, l, xs, 1e-15);
+ }
+ 
+@@ -199,7 +200,7 @@ TEST(EllipseTest, BezierIntersection) {
      std::vector<ShapeIntersection> xs = e.intersect(b);
  
      EXPECT_EQ(xs.size(), 2ul);
@@ -117,7 +137,7 @@ index 561c285..d6e65d8 100644
  
  TEST(EllipseTest, Coefficients) {
 diff --git a/tests/line-test.cpp b/tests/line-test.cpp
-index 99546dd..2399130 100644
+index 99546ddc..23991300 100644
 --- a/tests/line-test.cpp
 +++ b/tests/line-test.cpp
 @@ -91,10 +91,12 @@ TEST(LineTest, Reflection) {
@@ -146,7 +166,7 @@ index 99546dd..2399130 100644
      lines.push_back(Line(Point(1e9,1e9), Point(1,1)));
      //the case below will never work without normalizing the line
 diff --git a/tests/parallelogram-test.cpp b/tests/parallelogram-test.cpp
-index 8109ead..70ccea1 100644
+index 8109eadd..70ccea13 100644
 --- a/tests/parallelogram-test.cpp
 +++ b/tests/parallelogram-test.cpp
 @@ -106,13 +106,13 @@ TEST(ParallelogramTest, area)
@@ -168,5 +188,5 @@ index 8109ead..70ccea1 100644
  
  class ParallelogramTest
 -- 
-2.26.2
+2.27.0