dtlib: fix include_path edge case

The documentation says DT.__init__ takes any iterable for the
include_path, but this leads to bad results when you pass it something
other than a 'real' sequence (list/tuple/etc), like a generator:

>>> dt = DT('/tmp/foo.dts', (x for x in ['a', 'b', 'c']))
>>> repr(dt)
"DT(filename='/tmp/foo.dts', include_path=<generator object ...>)"

Make a copy in list form just to avoid things like this.

Add a test for this and relax the regular expression in the existing
test case related to this.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>

scripts/dts/python-devicetree/src/devicetree/dtlib.py

@@ -708,7 +708,7 @@ class DT:
           relative to the .dts file that contains the /include/ or /incbin/.
         """
         self.filename = filename
-        self._include_path = include_path
+        self._include_path = list(include_path)
 
         with open(filename, encoding="utf-8") as f:
             self._file_contents = f.read()

scripts/dts/python-devicetree/tests/test_dtlib.py

@@ -2077,7 +2077,7 @@ foo: / {
 def test_reprs():
     '''Test the __repr__() functions.'''
 
-    dt = parse("""
+    dts = """
 /dts-v1/;
 
 / {
@@ -2086,16 +2086,22 @@ def test_reprs():
 		y = < 1 >;
 	};
 };
-""",
+"""
-    include_path=("foo", "bar"))
 
-    assert re.fullmatch(r"DT\(filename='.*', include_path=\('foo', 'bar'\)\)",
+    dt = parse(dts, include_path=("foo", "bar"))
+
+    assert re.fullmatch(r"DT\(filename='.*', include_path=.'foo', 'bar'.\)",
                         repr(dt))
     assert re.fullmatch("<Property 'x' at '/' in '.*'>",
                         repr(dt.root.props["x"]))
     assert re.fullmatch("<Node /sub in '.*'>",
                         repr(dt.root.nodes["sub"]))
 
+    dt = parse(dts, include_path=iter(("foo", "bar")))
+
+    assert re.fullmatch(r"DT\(filename='.*', include_path=.'foo', 'bar'.\)",
+                        repr(dt))
+
 def test_names():
     '''Tests for node/property names.'''