Address review comments

Signed-off-by: Tushar Goel <tushar.goel.dav@gmail.com>

Author: TG1999

vulnerabilities/importers/gentoo.py

@@ -27,7 +27,10 @@
 class GentooImporter(Importer):
     repo_url = "git+https://anongit.gentoo.org/git/data/glsa.git"
     spdx_license_expression = "CC-BY-SA-4.0"
-    license_url = "https://anongit.gentoo.org/"
+    # the license notice is at this url https://anongit.gentoo.org/ says:
+    # The contents of this document, unless otherwise expressly stated, are licensed
+    # under the [CC-BY-SA-4.0](https://creativecommons.org/licenses/by-sa/4.0/) license.
+    license_url = "https://creativecommons.org/licenses/by-sa/4.0/"
 
     def advisory_data(self) -> Iterable[AdvisoryData]:
         try:
@@ -42,12 +45,12 @@ def advisory_data(self) -> Iterable[AdvisoryData]:
     def process_file(self, file):
         cves = []
         summary = ""
-        vuln_reference = []
+        vuln_references = []
         xml_root = ET.parse(file).getroot()
         id = xml_root.attrib.get("id")
         if id:
             glsa = "GLSA-" + id
-            vuln_reference = [
+            vuln_references = [
                 Reference(
                     reference_id=glsa,
                     url=f"https://security.gentoo.org/glsa/{id}",
@@ -70,7 +73,7 @@ def process_file(self, file):
             yield AdvisoryData(
                 aliases=[cve],
                 summary=summary,
-                references=vuln_reference,
+                references=vuln_references,
                 affected_packages=affected_packages,
             )
 
@@ -89,17 +92,15 @@ def cves_from_reference(reference):
     def affected_and_safe_purls(affected_elem):
         safe_versions = set()
         affected_versions = set()
+        # TODO : Revisit why we are skipping some versions in gentoo importer
         skip_versions = {"1.3*", "7.3*", "7.4*"}
         for pkg in affected_elem:
             for info in pkg:
                 if info.text in skip_versions:
                     continue
                 name = pkg.attrib.get("name")
                 if name:
-                    (
-                        pkg_ns,
-                        pkg_name,
-                    ) = name.split("/")
+                    pkg_ns, _, pkg_name = name.rpartition("/")
                 purl = PackageURL(type="ebuild", name=pkg_name, namespace=pkg_ns)
 
                 if info.attrib.get("range"):