type_parsing: parse mapping values that contain ` ` like `struct SortedTroves.Node`

slither/solc_parsing/solidity_types/type_parsing.py

@@ -133,7 +133,7 @@ def _find_from_type_name(  # pylint: disable=too-many-locals,too-many-branches,t
         if name.startswith("mapping("):
             # nested mapping declared with var
             if name.count("mapping(") == 1:
-                found = re.findall("mapping\(([a-zA-Z0-9\.]*) => ([a-zA-Z0-9\.\[\]]*)\)", name)
+                found = re.findall("mapping\(([a-zA-Z0-9\.]*) => ([ a-zA-Z0-9\.\[\]]*)\)", name)
             else:
                 found = re.findall(
                     "mapping\(([a-zA-Z0-9\.]*) => (mapping\([=> a-zA-Z0-9\.\[\]]*\))\)", name,