gh-35007: Fix some cannot
    
Fix #34944
    
URL: #35007
Reported by: Frédéric Chapoton
Reviewer(s): Matthias Köppe

Author: Release Manager

src/sage/combinat/alternating_sign_matrix.py

@@ -1197,7 +1197,7 @@ def _element_constructor_(self, asm, check=True):
         if isinstance(asm, AlternatingSignMatrix):
             if asm.parent() is self:
                 return asm
-            raise ValueError("Cannot convert between alternating sign matrices of different sizes")
+            raise ValueError("cannot convert between alternating sign matrices of different sizes")
         try:
             m = self._matrix_space(asm)
         except (TypeError, ValueError):

src/sage/combinat/decorated_permutation.py

@@ -213,7 +213,7 @@ def _element_constructor_(self, pi, check=True):
         if isinstance(pi, DecoratedPermutation):
             if pi.parent() is self:
                 return pi
-            raise ValueError("Cannot convert between decorated permutations of different sizes")
+            raise ValueError("cannot convert between decorated permutations of different sizes")
 
         pi = tuple(pi)
         if check and pi not in self:

src/sage/combinat/derangements.py

@@ -199,7 +199,7 @@ def _element_constructor_(self, der):
         if isinstance(der, Derangement):
             if der.parent() is self:
                 return der
-            raise ValueError("Cannot convert %s to an element of %s" % (der, self))
+            raise ValueError("cannot convert %s to an element of %s" % (der, self))
         return self.element_class(self, der)
 
     Element = Derangement

src/sage/data_structures/bounded_integer_sequences.pyx

@@ -1212,7 +1212,7 @@ cdef class BoundedIntegerSequence:
             sage: T+None
             Traceback (most recent call last):
             ...
-            TypeError: Cannot concatenate bounded integer sequence and None
+            TypeError: cannot concatenate bounded integer sequence and None
 
         TESTS:
 
@@ -1228,7 +1228,7 @@ cdef class BoundedIntegerSequence:
         """
         cdef BoundedIntegerSequence myself, right, out
         if other is None or self is None:
-            raise TypeError('Cannot concatenate bounded integer sequence and None')
+            raise TypeError('cannot concatenate bounded integer sequence and None')
         myself = self  # may result in a type error
         right = other  #  --"--
         if right.data.itembitsize != myself.data.itembitsize:

src/sage/geometry/lattice_polytope.py

@@ -5251,8 +5251,8 @@ def from_palp_index(i):
             elif o in range(65, 91):
                 i = o - 28
             else:
-                raise ValueError('Cannot convert PALP index '
-                                 + i + ' to number.')
+                raise ValueError('cannot convert PALP index '
+                                 + i + ' to number')
         return i
     n = len(permutation)
     domain = [from_palp_index(i) for i in permutation]
@@ -5261,6 +5261,7 @@ def from_palp_index(i):
     S = SymmetricGroup(n)
     return make_permgroup_element(S, domain)
 
+
 def _read_nef_x_partitions(data):
     r"""
     Read all nef-partitions for one polytope from a string or an open

src/sage/geometry/polyhedron/parent.py

@@ -697,7 +697,7 @@ def convert_base_ring_Hrep(lstlst):
             return self._element_constructor_polyhedron(polyhedron, mutable=mutable, **kwds)
         if nargs == 1 and args[0] == 0:
             return self.zero()
-        raise ValueError('Cannot convert to polyhedron object.')
+        raise ValueError('cannot convert to polyhedron object')
 
     def _element_constructor_polyhedron(self, polyhedron, **kwds):
         """

src/sage/libs/giac/giac.pyx

@@ -1408,7 +1408,7 @@ cdef class Pygen(GiacMethods_base):
             return result
 
         else:
-            raise TypeError("Cannot convert non giac integers to Integer")
+            raise TypeError("cannot convert non giac integers to Integer")
 
 
     def _rational_(self,Z=None):
@@ -1433,7 +1433,7 @@ cdef class Pygen(GiacMethods_base):
             # giac _RAT_
             return ZZ(self.numer()) / ZZ(self.denom())
         else:
-            raise TypeError("Cannot convert non giac _FRAC_ to QQ")
+            raise TypeError("cannot convert non giac _FRAC_ to QQ")
 
 
     def sage(self):
@@ -1735,7 +1735,7 @@ cdef class Pygen(GiacMethods_base):
                 sig_off()
                 return result
             else:
-                raise TypeError("Cannot convert non _INT_ giac gen")
+                raise TypeError("cannot convert non _INT_ giac gen")
 
 
     property _double:  # immediate double (type _DOUBLE_)
@@ -1749,7 +1749,7 @@ cdef class Pygen(GiacMethods_base):
                 sig_off()
                 return result
             else:
-                raise TypeError("Cannot convert non _DOUBLE_ giac gen")
+                raise TypeError("cannot convert non _DOUBLE_ giac gen")
 
     property help:
         def __get__(self):

src/sage/libs/pari/convert_sage.pyx

@@ -352,7 +352,7 @@ cpdef set_integer_from_gen(Integer self, Gen x):
             break
         elif paritype == t_PADIC:
             if x._valp() < 0:
-                raise TypeError("Cannot convert p-adic with negative valuation to an integer")
+                raise TypeError("cannot convert p-adic with negative valuation to an integer")
             # Lifting a PADIC yields an integer
             x = x.lift()
             break

src/sage/libs/singular/function.pyx

@@ -1304,7 +1304,7 @@ cdef class SingularFunction(SageObject):
                     dummy_ring = PolynomialRing(QQ, "dummy", implementation="singular") # seems a reasonable default
                 ring = dummy_ring
         if not (isinstance(ring, MPolynomialRing_libsingular) or isinstance(ring, NCPolynomialRing_plural)):
-            raise TypeError("Cannot call Singular function '%s' with ring parameter of type '%s'"%(self._name,type(ring)))
+            raise TypeError("cannot call Singular function '%s' with ring parameter of type '%s'" % (self._name,type(ring)))
         return call_function(self, args, ring, interruptible, attributes)
 
     def _instancedoc_(self):

src/sage/modules/vector_rational_dense.pyx

@@ -326,7 +326,7 @@ cdef class Vector_rational_dense(free_module_element.FreeModuleElement):
             mpq_set_z(a.value, (<Integer>left).value)
         else:
             # should not happen
-            raise TypeError("Cannot convert %s to %s" % (type(left).__name__, Rational.__name__))
+            raise TypeError("cannot convert %s to %s" % (type(left).__name__, Rational.__name__))
         z = self._new_c()
         cdef Py_ssize_t i
         for i in range(self._degree):
@@ -343,7 +343,7 @@ cdef class Vector_rational_dense(free_module_element.FreeModuleElement):
             mpq_set_z(a.value, (<Integer>right).value)
         else:
             # should not happen
-            raise TypeError("Cannot convert %s to %s" % (type(right).__name__, Rational.__name__))
+            raise TypeError("cannot convert %s to %s" % (type(right).__name__, Rational.__name__))
         z = self._new_c()
         cdef Py_ssize_t i
         for i in range(self._degree):