diff --git a/src/sage/matrix/matrix_complex_ball_dense.pyx b/src/sage/matrix/matrix_complex_ball_dense.pyx
index 4bdb24111a7..3a78c4a29d9 100644
--- a/src/sage/matrix/matrix_complex_ball_dense.pyx
+++ b/src/sage/matrix/matrix_complex_ball_dense.pyx
@@ -9,7 +9,6 @@ This is a rudimentary binding to the `Arb library
`_; it may be useful to refer to its
documentation for more details.
-You may have to run ``sage -i arb`` to use the arb library.
"""
#*****************************************************************************
# Copyright (C) 2014 Clemens Heuberger
@@ -166,7 +165,7 @@ cdef class Matrix_complex_ball_dense(matrix_dense.Matrix_dense):
entries,
copy,
coerce):
- """
+ r"""
Initialize a dense matrix over the complex ball field.
INPUT:
@@ -187,7 +186,7 @@ cdef class Matrix_complex_ball_dense(matrix_dense.Matrix_dense):
EXAMPLES:
- The __init__ function is called implicitly in each of the
+ The ``__init__`` function is called implicitly in each of the
examples below to actually fill in the values of the matrix.
We create a `2 \times 2` and a `1\times 4` matrix::
@@ -232,7 +231,7 @@ cdef class Matrix_complex_ball_dense(matrix_dense.Matrix_dense):
[1.000000000000000 0]
Matrices can have many rows or columns (in fact, on a 64-bit
- machine they could have up to `2^64-1` rows or columns)::
+ machine they could have up to `2^{64}-1` rows or columns)::
sage: v = matrix(CBF, 1, 10^5, range(10^5))
sage: v.parent()