minor fixes

Author: saranti

doc/users/next_whats_new/axline_setters.rst

@@ -1,6 +1,7 @@
 Axline setters and getters
 --------------------------
-The returned object from ``Axes.axline`` now supports getter and setter
+
+The returned object from `.axes.Axes.axline` now supports getter and setter
 methods for its *xy1*, *xy2* and *slope* attributes:
 
 .. code-block:: python

lib/matplotlib/lines.py

@@ -1562,7 +1562,7 @@ def set_xy1(self, x, y):
 
         Parameters
         ----------
-        x, y : (float, float)
+        x, y : float
             Points for the line to pass through.
         """
         self._xy1 = x, y
@@ -1573,7 +1573,7 @@ def set_xy2(self, x, y):
 
         Parameters
         ----------
-        x, y : (float, float)
+        x, y : float
             Points for the line to pass through.
         """
         if self._slope is None:

lib/matplotlib/tests/test_lines.py

@@ -429,10 +429,10 @@ def test_axline_setters():
     assert line2.get_xy2() == (.6, .8)
     # Testing setting xy2 and slope together.
     # These test should raise a ValueError
-    with pytest.raises(ValueError, match="Cannot set an 'xy2' value while "
-                                         "'slope' is set"):
+    with pytest.raises(ValueError,
+                       match="Cannot set an 'xy2' value while 'slope' is set"):
         line1.set_xy2(.2, .3)
 
-    with pytest.raises(ValueError, match="Cannot set a 'slope' value while "
-                                         "'xy2' is set"):
+    with pytest.raises(ValueError,
+                       match="Cannot set a 'slope' value while 'xy2' is set"):
         line2.set_slope(3)