Minor imperovements

platformio/package/manager/_registry.py

@@ -139,14 +139,13 @@ class PackageManageRegistryMixin(object):
     def fetch_registry_package(self, spec):
         assert isinstance(spec, PackageSpec)
         result = None
+        regclient = self.get_registry_client_instance()
         if spec.owner and spec.name:
-            result = self.get_registry_client_instance().get_package(
-                self.pkg_type, spec.owner, spec.name
-            )
+            result = regclient.get_package(self.pkg_type, spec.owner, spec.name)
         if not result and (spec.id or (spec.name and not spec.owner)):
             packages = self.search_registry_packages(spec)
             if packages:
-                result = self.get_registry_client_instance().get_package(
+                result = regclient.get_package(
                     self.pkg_type, packages[0]["owner"]["username"], packages[0]["name"]
                 )
         if not result:

platformio/platform/base.py

@@ -114,7 +114,7 @@ class PlatformBase(  # pylint: disable=too-many-instance-attributes,too-many-pub
         core_spec = semantic_version.SimpleSpec(self.engines["platformio"])
         if self.CORE_SEMVER in core_spec:
             return True
-        # PIO Core 4 is compatible with dev-platforms for PIO Core 2.0, 3.0, 4.0
+        # PIO Core 5 is compatible with dev-platforms for PIO Core 2.0, 3.0, 4.0
         if any(semantic_version.Version.coerce(str(v)) in core_spec for v in (2, 3, 4)):
             return True
         raise IncompatiblePlatform(self.name, str(self.CORE_SEMVER), str(core_spec))