diff --git a/opm/core/linalg/sparse_sys.h b/opm/core/linalg/sparse_sys.h
index b69ce6b9f..5b83d8b04 100644
--- a/opm/core/linalg/sparse_sys.h
+++ b/opm/core/linalg/sparse_sys.h
@@ -48,8 +48,8 @@ struct CSRMatrix
 
 
 /**
- * Allocate a matrix structure and corresponding row pointers,
- * @c ia, sufficiently initialised to support "count and push-back"
+ * Allocate a matrix structure and corresponding row pointers, @c ia,
+ * sufficiently initialised to support "count and push-back"
  * construction scheme.
  *
  * The matrix will be fully formed in csrmatrix_new_elms_pushback().
@@ -57,10 +57,10 @@ struct CSRMatrix
  * \param[in] m Number of matrix rows.
  *
  * \return Allocated matrix structure with allocated row pointers and
- * valid @c m field.  The row pointer elements are initialised all zero
- * to simplify the non-zero element counting procedure.  The @c ja and
- * @c sa fields are NULL.  This function returns NULL in case of
- * allocation failure.
+ * valid @c m field.  The row pointer elements are initialised all
+ * zero to simplify the non-zero element counting procedure.  The @c
+ * ja and @c sa fields are NULL.  This function returns NULL in case
+ * of allocation failure.
  */
 struct CSRMatrix *
 csrmatrix_new_count_nnz(size_t m);
@@ -71,13 +71,13 @@ csrmatrix_new_count_nnz(size_t m);
  * sparse matrix with a specified number of (structural) non-zero
  * elements.
  *
- * The contents of the individual matrix arrays is undefined.  In particular,
- * the sparsity pattern must be constructed through some other, external,
- * means prior to using the matrix in (e.g.,) a global system assembly
- * process.
+ * The contents of the individual matrix arrays is undefined.  In
+ * particular, the sparsity pattern must be constructed through some
+ * other, external, means prior to using the matrix in (e.g.,) a
+ * global system assembly process.
  *
- * The memory resources should be released through the csrmatrix_delete()
- * function.
+ * The memory resources should be released through the
+ * csrmatrix_delete() function.
  *
  * \param[in] m   Number of matrix rows.
  * \param[in] nnz Number of structural non-zeros.
@@ -90,27 +90,31 @@ csrmatrix_new_known_nnz(size_t m, size_t nnz);
 
 
 /**
- * Set row pointers and allocate column index and matrix element arrays of
- * a matrix previous obtained from csrmatrix_new_count_nnz().
+ * Set row pointers and allocate column index and matrix element
+ * arrays of a matrix previous obtained from
+ * csrmatrix_new_count_nnz().
  *
- * The memory resources should be released through the csrmatrix_delete()
- * function.
+ * The memory resources should be released through the
+ * csrmatrix_delete() function.
  *
- * This function assumes that, on input, the total number of structurally
- * non-zero elements of row @c i are stored in @c A->ia[i+1] for all
- * <CODE>i = 0, ..., A->m - 1</CODE> and that <CODE>A->ia[0] == 0</CODE>.
- * If successful, then on output the row pointers are valid.  If not, then
- * the @c A->ja and @c A->sa arrays remain unallocated.
+ * This function assumes that, on input, the total number of
+ * structurally non-zero elements of row @c i are stored in @c
+ * A->ia[i+1] for all <CODE>i = 0, ..., A->m - 1</CODE> and that
+ * <CODE>A->ia[0] == 0</CODE>.  If successful, then on output the row
+ * pointers are valid.  If not, then the @c A->ja and @c A->sa arrays
+ * remain unallocated.
  *
- * Following a successful call to csmatrix_new_elms_pushback(), the entire
- * matrix structure (sparsity pattern) is structurally consistent, but the
- * contents of the @c ja and @c sa arrays is undefined and must be set prior
- * to using the matrix in, e.g., a pressure system solve.
+ * Following a successful call to csmatrix_new_elms_pushback(), the
+ * entire matrix structure (sparsity pattern) is structurally
+ * consistent, but the contents of the @c ja and @c sa arrays is
+ * undefined and must be set prior to using the matrix in, e.g., a
+ * pressure system solve.
  *
  * \param[in,out] A Matrix.
  *
  * \return Total number of allocated non-zeros, <CODE>A->nnz ==
- * A->ia[A->m]</CODE> if successful and zero in case of allocation failure.
+ * A->ia[A->m]</CODE> if successful and zero in case of allocation
+ * failure.
  */
 size_t
 csrmatrix_new_elms_pushback(struct CSRMatrix *A);
@@ -135,8 +139,9 @@ csrmatrix_elm_index(int i, int j, const struct CSRMatrix *A);
  * Sort column indices within each matrix row in ascending order.
  *
  * The corresponding matrix elements (i.e., @c sa) are not referenced.
- * Consequently, following a call to csrmatrix_sortrows(), all relations
- * to any pre-existing matrix elements are lost and must be rebuilt.
+ * Consequently, following a call to csrmatrix_sortrows(), all
+ * relations to any pre-existing matrix elements are lost and must be
+ * rebuilt.
  *
  * After a call to csrmatrix_sortrows(), the following relation holds
  * <CODE>A->ja[k] < A->ja[k+1]</CODE> for all <CODE>k = A->ia[i], ...,
@@ -163,8 +168,8 @@ csrmatrix_delete(struct CSRMatrix *A);
 
 
 /**
- * Zero all matrix elements, typically in preparation of
- * elemental assembly.
+ * Zero all matrix elements, typically in preparation of elemental
+ * assembly.
  *
  * \param[in,out] A Matrix for which to zero the elements.
  */
@@ -208,7 +213,8 @@ csrmatrix_write(const struct CSRMatrix *A, const char *fn);
  * MATLAB© or Octave.
  *
  * \param[in] A  Matrix.
- * \param[in] fp Open (text) stream to which matrix contents will be output.
+ * \param[in] fp Open (text) stream to which matrix contents will be
+ *               output.
  */
 void
 csrmatrix_write_stream(const struct CSRMatrix *A, FILE *fp);
@@ -217,8 +223,8 @@ csrmatrix_write_stream(const struct CSRMatrix *A, FILE *fp);
 /**
  * Print vector to file.
  *
- * Elements are printed with one line (separated by '\n')
- * per vector element.
+ * Elements are printed with one line (separated by '\n') per vector
+ * element.
  *
  * This function is implemented in terms of vector_write_stream().
  *
@@ -233,12 +239,13 @@ vector_write(size_t n, const double *v, const char *fn);
 /**
  * Print vector to stream.
  *
- * Elements are printed with one line (separated by '\n')
- * per vector element.
+ * Elements are printed with one line (separated by '\n') per vector
+ * element.
  *
  * \param[in] n  Number of vector elements.
  * \param[in] v  Vector.
- * \param[in] fp Open (text) stream to which vector contents will be output.
+ * \param[in] fp Open (text) stream to which vector contents will be
+ *               output.
  */
 void
 vector_write_stream(size_t n, const double *v, FILE *fp);