Rebase

src/pyhf/pdf.py

@@ -609,7 +609,7 @@ def expected_data(self, pars, return_by_sample=False):
         # Verify parameter shapes
         if pars.shape[-1] != self.config.npars:
             raise exceptions.InvalidPdfParameters(
-                f'eval failed as pars has len {pars.shape[-1]} but {self.config.npars} was expected'
+                f"eval failed as pars has len {pars.shape[-1]} but {self.config.npars} was expected"
             )
 
         deltas, factors = self._modifications(pars)
@@ -714,7 +714,7 @@ def expected_auxdata(self, pars):
         # Verify parameter shapes
         if pars.shape[-1] != self.config.npars:
             raise exceptions.InvalidPdfParameters(
-                f'eval failed as pars has len {pars.shape[-1]} but {self.config.npars} was expected'
+                f"eval failed as pars has len {pars.shape[-1]} but {self.config.npars} was expected"
             )
 
         return self.make_pdf(pars)[1].expected_data()
@@ -743,7 +743,7 @@ def expected_actualdata(self, pars):
         # Verify parameter shapes
         if pars.shape[-1] != self.config.npars:
             raise exceptions.InvalidPdfParameters(
-                f'eval failed as pars has len {pars.shape[-1]} but {self.config.npars} was expected'
+                f"eval failed as pars has len {pars.shape[-1]} but {self.config.npars} was expected"
             )
 
         return self.make_pdf(pars)[0].expected_data()
@@ -764,7 +764,7 @@ def expected_data(self, pars, include_auxdata=True):
         # Verify parameter shapes
         if pars.shape[-1] != self.config.npars:
             raise exceptions.InvalidPdfParameters(
-                f'eval failed as pars has len {pars.shape[-1]} but {self.config.npars} was expected'
+                f"eval failed as pars has len {pars.shape[-1]} but {self.config.npars} was expected"
             )
 
         if not include_auxdata: