Handle case inspect fails on repl-defined objects

[darrenburns]

Type of changes

• Bug fix
• New feature
• Documentation / docstrings
• Tests
• Other

Checklist

• I've run the latest black with default args on new code.
• I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate.
• I've added tests for new code.
• I accept that @willmcgugan may be pedantic in the code review.

Description

Objects defined in a REPL are part of the __main__ scope, which doesn't have a corresponding file, and so rich.inspect was failing when trying to find this filename.

inspect.getfile raises an OSError in this case.

We catch the OSError and ignore it, as the rest of the code already handles the case where there is no source_filename available.

Closes #2033

[codecov-commenter]

Codecov Report

Merging #2037 (38aa939) into master (75f4637) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2037   +/-   ##
=======================================
  Coverage   99.81%   99.81%           
=======================================
  Files          71       71           
  Lines        7058     7058           
=======================================
  Hits         7045     7045           
  Misses         13       13           

Flag	Coverage Δ
unittests	99.81% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
rich/__init__.py	100.00% <100.00%> (ø)
rich/_inspect.py	100.00% <100.00%> (ø)

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[willmcgugan]

That was simple :)