sage

5d7d2e34 -

gh-36882: fixing one bug in the use of valuation Trying to divide by an integer was failing here: ``` sage: L=PowerSeriesRing(QQ,'t') sage: t=L.gen() sage: F=algebras.Free(L,['A','B','C']) sage: A,B,C=F.gens() sage: f=t*A+t**2*B/2 # BUG HERE ``` and the same for Lazy power series. ### :memo: Checklist - [x] The title is concise, informative, and self-explanatory. - [x] The description explains in detail what this PR is about. - [x] I have created tests covering the changes. URL: https://github.com/sagemath/sage/pull/36882 Reported by: Frédéric Chapoton Reviewer(s): Travis Scrimshaw