fixed static tests

pyoptgra/__init__.py

@@ -12,15 +12,14 @@
 # file, you can obtain them at https://www.gnu.org/licenses/gpl-3.0.txt
 # and https://essr.esa.int/license/european-space-agency-community-license-v2-4-weak-copyleft
 
-from .khan import inverse_triangular_wave  # noqa
-from .khan import khan_function_triangle  # noqa
+from ._about import __version__  # noqa
 from .khan import (  # noqa
     base_khan_function,
+    inverse_triangular_wave,
     khan_function_sin,
     khan_function_tanh,
+    khan_function_triangle,
     triangular_wave_fourier,
     triangular_wave_fourier_grad,
 )
 from .optgra import optgra  # noqa
-
-from ._about import __version__  # noqa