fix: FormatReporter was mutating results.

Somewhere along the way in python land, vars turned
into a view- not a copy.  Thus the problem.

Signed-off-by: Brian Harring <ferringb@gmail.com>

Author: ferringb

src/pkgcheck/reporters.py

@@ -283,7 +283,7 @@ def _consume_reports_generator(self) -> T_process_report:
 
         while True:
             result = yield
-            attrs = vars(result)
+            attrs = vars(result).copy()
             attrs.update((k, getattr(result, k)) for k in properties)
             s = formatter.format(self.format_str, **attrs)
             # output strings with at least one valid expansion or non-whitespace character