Fix character comparison flake8 errors

Author: bridadan

src/mbed_os_tools/detect/lstools_base.py

@@ -398,9 +398,9 @@ def mock_manufacture_id(self, mid, platform_name, oper="+"):
                     '-' remove mid from mocking entry
         @return Mocked structure (json format)
         """
-        if oper is "+":
+        if oper == "+":
             self.plat_db.add(mid, platform_name, permanent=True)
-        elif oper is "-":
+        elif oper == "-":
             self.plat_db.remove(mid, permanent=True)
         else:
             raise ValueError("oper can only be [+-]")

src/mbed_os_tools/detect/platform_database.py

@@ -514,7 +514,7 @@ def remove(self, id, permanent=False, device_type="daplink", verbose_data=False)
         as a dict.
         """
         logger.debug("Trying remove of %s", id)
-        if id is "*" and device_type in self._dbs[self._prim_db]:
+        if id == "*" and device_type in self._dbs[self._prim_db]:
             self._dbs[self._prim_db][device_type] = {}
             if permanent:
                 self._update_db()