idlelib: stray comma makes __repr__ format a one-element tuple #161477

Bug report

The comma inside the substitution field makes the expression a one-element
tuple, so repr() returns ('WidgetRedirector',)(Text<.text>) instead of
WidgetRedirector(Text<.text>). The same mistake is duplicated in
OriginalCommand.__repr__ in the same file.

Found by Linux Verification Center (linuxtesting.org) with SVACE

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-161477: Fix single-element tuple in idlelib redirector __repr__ #161481
• [3.15] gh-161477: Fix single-element tuple in idlelib redirector __repr__ (GH-161481) #161521
• [3.14] gh-161477: Fix single-element tuple in idlelib redirector __repr__ (GH-161481) #161522