add line breaks, remove unused import

Author: Biffo89

src/sage/matrix/matrix_gf2e_dense.pyx

@@ -82,7 +82,6 @@ REFERENCES:
 #*****************************************************************************
 
 from cysignals.signals cimport sig_on, sig_off
-from cpython.sequence cimport PySequence_Fast
 
 cimport sage.matrix.matrix_dense as matrix_dense
 from sage.structure.element cimport Matrix

src/sage/matrix/matrix_integer_dense.pyx

@@ -477,7 +477,8 @@ cdef class Matrix_integer_dense(Matrix_dense):
         return fmpz_is_zero(fmpz_mat_entry(self._matrix, i,j))
 
     cdef copy_from_unsafe(self, Py_ssize_t iDst, Py_ssize_t jDst, src, Py_ssize_t iSrc, Py_ssize_t jSrc):
-        """Copy position iSrc,jSrc of ``src`` to position iDst,jDst of ``self``.
+        """
+        Copy position iSrc,jSrc of ``src`` to position iDst,jDst of ``self``.
 
         The object ``src`` must be of type ``Matrix_integer_dense`` and have
         the same base ring as ``self``.

src/sage/matrix/matrix_integer_sparse.pyx

@@ -119,7 +119,8 @@ cdef class Matrix_integer_sparse(Matrix_sparse):
         return x
 
     cdef copy_from_unsafe(self, Py_ssize_t iDst, Py_ssize_t jDst, src, Py_ssize_t iSrc, Py_ssize_t jSrc):
-        """Copy position iSrc,jSrc of ``src`` to position iDst,jDst of ``self``.
+        """
+        Copy position iSrc,jSrc of ``src`` to position iDst,jDst of ``self``.
 
         The object ``src`` must be of type ``Matrix_integer_sparse`` and have
         the same base ring as ``self``.