twister: reports: Pretty print XML reports

Pretty print XML reports with tab identation on levels for better
readability and ease text diff there as well.

Signed-off-by: Dmitrii Golovanov <[email protected]>

Author: golowanow

scripts/pylib/twister/twisterlib/reports.py

@@ -191,6 +191,7 @@ def xunit_report_suites(self, json_file, filename):
             eleTestsuite.attrib['skipped'] = f"{skips}"
             eleTestsuite.attrib['tests'] = f"{total}"
 
+        ET.indent(eleTestsuites, space="\t", level=0)
         result = ET.tostring(eleTestsuites)
         with open(filename, 'wb') as report:
             report.write(result)
@@ -280,6 +281,7 @@ def xunit_report(self, json_file, filename, selected_platform=None, full_report=
             eleTestsuite.attrib['skipped'] = f"{skips}"
             eleTestsuite.attrib['tests'] = f"{total}"
 
+        ET.indent(eleTestsuites, space="\t", level=0)
         result = ET.tostring(eleTestsuites)
         with open(filename, 'wb') as report:
             report.write(result)