Apply suggestions from code review

Co-authored-by: J. Alvarez-Jarreta <jalvarez@ebi.ac.uk>

src/python/ensembl/io/genomio/gff3/restructure.py

@@ -134,12 +134,14 @@ def move_only_exons_to_new_mrna(gene: SeqFeature) -> None:
 
 
 def move_cds_to_existing_mrna(gene: SeqFeature) -> None:
-    """Move CDS child features of a gene, to the mRNA.
+    """Move CDS child features of a gene to the mRNA.
 
     This is to fix the case where we have the following structure::
         gene -> [ mRNA, CDSs ]
+
     and change it to::
         gene -> [ mRNA -> [ CDSs ] ]
+
     The mRNA itself might have exons, in which case check that they match the CDS coordinates.
 
     Args:

src/python/ensembl/io/genomio/gff3/simplifier.py

@@ -75,8 +75,11 @@ def __init__(
 
         Args:
             genome_path: Genome metadata file.
-            skip_unrecognized: If a biotype is unknown, don't include it. Raise GFFParserError otherwise.
+            skip_unrecognized: Do not include unknown biotypes instead of raising an exception.
             allow_pseudogene_with_cds: Keep CDSs under pseudogenes that have them. Delete them otherwise.
+
+        Raises:
+            GFFParserError: If a biotype is unknown and `skip_unrecognized` is False.
         """
         self.skip_unrecognized = skip_unrecognized
         self.allow_pseudogene_with_cds = allow_pseudogene_with_cds