Made code formatter happy; added test fixtures

tests/examples/hanoi_fixture.txt

@@ -0,0 +1,64 @@
+
+ Step 0
+
+  1     
+  2     
+  3     
+---------
+  L C R
+
+ Step 1
+
+
+  2     
+  3   1 
+---------
+  L C R
+
+ Step 2
+
+
+
+  3 2 1 
+---------
+  L C R
+
+ Step 3
+
+
+    1   
+  3 2   
+---------
+  L C R
+
+ Step 4
+
+
+    1   
+    2 3 
+---------
+  L C R
+
+ Step 5
+
+
+
+  1 2 3 
+---------
+  L C R
+
+ Step 6
+
+
+      2 
+  1   3 
+---------
+  L C R
+
+ Step 7
+
+      1 
+      2 
+      3 
+---------
+  L C R

tests/examples/hanoi_simple_fixture.txt

@@ -0,0 +1,7 @@
+1. Move disk from left pole to right pole.
+2. Move disk from left pole to center pole.
+3. Move disk from right pole to center pole.
+4. Move disk from left pole to right pole.
+5. Move disk from center pole to left pole.
+6. Move disk from center pole to right pole.
+7. Move disk from left pole to right pole.

tests/examples/test_coins.py

@@ -2,8 +2,8 @@
 
 from pyswip.examples.coins import solve, prolog_source
 
-class CoinsTestCase(unittest.TestCase):
 
+class CoinsTestCase(unittest.TestCase):
     def test_solve(self):
         fixture = [{1: 3, 5: 0, 10: 30, 50: 0, 100: 0}]
         soln = solve(coin_count=33, total_cents=303, max_solutions=1)

tests/examples/test_hanoi.py

@@ -6,7 +6,6 @@
 
 
 class HanoiTestCase(unittest.TestCase):
-
     def test_solve(self):
         fixture = load_fixture("hanoi_fixture.txt")
         sio = StringIO()

tests/examples/utils.py

@@ -4,4 +4,4 @@
 def load_fixture(filename: str) -> str:
     path = Path(__file__).parent / filename
     with open(path) as f:
-        return f.read()
+        return f.read()