#16476: merge with 3.2.

Lib/json/tool.py

@@ -31,7 +31,8 @@ def main():
         except ValueError as e:
             raise SystemExit(e)
     with outfile:
-        json.dump(obj, outfile, sort_keys=True, indent=4)
+        json.dump(obj, outfile, sort_keys=True,
+                  indent=4, separators=(',', ': '))
         outfile.write('\n')
 
 

Misc/NEWS

@@ -96,6 +96,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #16476: Fix json.tool to avoid including trailing whitespace.
+
 - Issue #16549: Make json.tool work again on Python 3 and add tests.
   Initial patch by Berker Peksag and Serhiy Storchaka.