typos

Author: xcaruso

src/sage/rings/polynomial/skew_polynomial_finite_order.pyx

@@ -195,7 +195,7 @@ cdef class SkewPolynomial_finite_order_dense(SkewPolynomial_generic_dense):
         By default, the name of the central variable is usually ``z`` (see
         :meth:`sage.rings.polynomial.skew_polynomial_ring.SkewPolynomiaRing_finite_order.center`
         for more details about this). 
-        However, the user can speciy a different variable name if he/she wish::
+        However, the user can specify a different variable name if desired:: 
 
             sage: a.reduced_trace(var='u')
             3*u + 4
@@ -258,7 +258,7 @@ cdef class SkewPolynomial_finite_order_dense(SkewPolynomial_generic_dense):
         By default, the name of the central variable is usually ``z`` (see
         :meth:`sage.rings.polynomial.skew_polynomial_ring.SkewPolynomiaRing_finite_order.center`
         for more details about this). 
-        However, the user can speciy a different variable name if he/she wish::
+        However, the user can speciify a different variable name if desired::
 
             sage: a.reduced_norm(var='u')
             u^3 + 4*u^2 + 4

src/sage/rings/polynomial/skew_polynomial_ring.py

@@ -1330,7 +1330,8 @@ def center(self, name=None, names=None, default=False):
         - ``name`` -- a string or ``None`` (default: ``None``); 
           the name for the central variable (namely `x^r`)
 
-        - ``default`` -- a boolean (default: ``False``)
+        - ``default`` -- a boolean (default: ``False``); if ``True``,
+          set the default variable name for the center to ``name``
 
         EXAMPLES::