diff --git a/pyzebra/cli.py b/pyzebra/cli.py
index 68c09c7..8d1f38d 100644
--- a/pyzebra/cli.py
+++ b/pyzebra/cli.py
@@ -13,7 +13,7 @@ logger = logging.getLogger(__name__)
 def main():
     """The pyzebra command line interface.
 
-    This is a wrapper around a bokeh server that provides an interface to launch the application, 
+    This is a wrapper around a bokeh server that provides an interface to launch the application,
     bundled with the pyzebra package.
     """
     app_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "app", "app.py")
diff --git a/pyzebra/xtal.py b/pyzebra/xtal.py
index 73722b8..f54aa76 100644
--- a/pyzebra/xtal.py
+++ b/pyzebra/xtal.py
@@ -220,7 +220,7 @@ def dandth(wave, z1):
 def angs4c(wave, z1, ch2, ph2):
     """CALCULATE 2-THETA, OMEGA (=THETA), CHI, PHI TO PUT THE
        VECTOR Z1 IN THE BISECTING DIFFRACTION CONDITION
-       
+
     Args:
         wave, z1, ch2, ph2
 
@@ -246,9 +246,9 @@ def angs4c(wave, z1, ch2, ph2):
 def fixdnu(wave, z1, ch2, ph2, nu):
     """CALCULATE A SETTING CH,PH,GA,OM TO PUT THE DIFFRACTED BEAM AT NU.
        PH PUTS THE DIFFRACTION VECTOR Z1 INTO THE CHI CIRCLE (AS FOR
-       BISECTING GEOMETRY), CH BRINGS THE VECTOR TO THE APPROPRIATE NU 
+       BISECTING GEOMETRY), CH BRINGS THE VECTOR TO THE APPROPRIATE NU
        AND OM THEN POSITIONS THE BEAM AT GA.
-       
+
     Args:
         wave, z1, ch2, ph2
 
@@ -308,7 +308,7 @@ def angtohkl(wave, ddist, gammad, om, ch, ph, nud, x, y):
         gammad, om, ch, ph, nud, xobs, yobs
 
     Returns:
-        
+
     """
     pir = 180 / np.pi