Merge branch 'trunk' into mod_poly-random-generation

I changed some random gen functions description and a nextline character
has been removed. I kept both changes.

Author: dlesnoff

doc/source/nmod_poly.rst

@@ -245,6 +245,7 @@ Randomization
 
     Generates a random monic pentomial of length ``len``.
 
+
 Construction of irreducible polynomials
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