Move SourceLocation formatting to SourceLocation.formatted

Author: ktosiek

src/graphql/error/format_error.py

@@ -18,7 +18,7 @@ def format_error(error: "GraphQLError") -> Dict[str, Any]:
     formatted: Dict[str, Any] = dict(  # noqa: E701 (pycqa/flake8#394)
         message=error.message or "An unknown error occurred.",
         locations=(
-            [{"line": l.line, "column": l.column} for l in error.locations]
+            [location.formatted for location in error.locations]
             if error.locations is not None
             else None
         ),

src/graphql/language/location.py

@@ -12,6 +12,10 @@ class SourceLocation(NamedTuple):
     line: int
     column: int
 
+    @property
+    def formatted(self):
+        return dict(line=self.line, column=self.column)
+
 
 def get_location(source: "Source", position: int) -> SourceLocation:
     """Get the line and column for a character position in the source.