24465: fix doctest

Author: videlec

src/doc/en/reference/coercion/index.rst

@@ -626,13 +626,13 @@ These are accessed via the :meth:`construction` method, which returns a
 
     sage: sage.categories.pushout.construction_tower(Frac(CDF['x']))
     [(None,
-     Fraction Field of Univariate Polynomial Ring in x over Complex Double Field),
-    (FractionField, Univariate Polynomial Ring in x over Complex Double Field),
-    (Poly[x], Complex Double Field),
-    (AlgebraicClosureFunctor, Real Double Field),
-    (Completion[+Infinity], Rational Field),
-    (FractionField, Integer Ring)]
-
+      Fraction Field of Univariate Polynomial Ring in x over Complex Double Field),
+     (FractionField, Univariate Polynomial Ring in x over Complex Double Field),
+     (Poly[x], Complex Double Field),
+     (AlgebraicClosureFunctor, Real Double Field),
+     (Completion[+Infinity, prec=53], Rational Field),
+     (FractionField, Integer Ring)]
+    
 Given Parents R and S, such that there is no coercion either from R to
 S or from S to R, one can find a common Z with coercions
 `R \rightarrow Z` and `S \rightarrow Z` by considering the sequence of