STY: use pytest.raises context syntax

[simonjayhawkins]

xref #24332

[gfyoung]

I like what you're doing here. Getting the error messages right can sometimes be tricky though...

(Trust me, I've had to hack through some of these myself recently 😉 )

[codecov]

Codecov Report

Merging #24655 into master will decrease coverage by 49.35%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master   #24655       +/-   ##
===========================================
- Coverage   92.37%   43.02%   -49.36%     
===========================================
  Files         166      166               
  Lines       52384    52384               
===========================================
- Hits        48391    22539    -25852     
- Misses       3993    29845    +25852

Flag	Coverage Δ
#multiple	?
#single	43.02% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/io/formats/latex.py	0% <0%> (-100%)	⬇️
pandas/core/categorical.py	0% <0%> (-100%)	⬇️
pandas/io/sas/sas_constants.py	0% <0%> (-100%)	⬇️
pandas/tseries/plotting.py	0% <0%> (-100%)	⬇️
pandas/tseries/converter.py	0% <0%> (-100%)	⬇️
pandas/io/formats/html.py	0% <0%> (-99.35%)	⬇️
pandas/core/groupby/categorical.py	0% <0%> (-95.46%)	⬇️
pandas/io/sas/sas7bdat.py	0% <0%> (-91.17%)	⬇️
pandas/io/sas/sas_xport.py	0% <0%> (-90.15%)	⬇️
pandas/core/tools/numeric.py	10.44% <0%> (-89.56%)	⬇️
... and 123 more

---

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[codecov]

Codecov Report

Merging #24655 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #24655      +/-   ##
==========================================
- Coverage   92.37%   92.37%   -0.01%     
==========================================
  Files         166      166              
  Lines       52384    52382       -2     
==========================================
- Hits        48391    48389       -2     
  Misses       3993     3993

Flag	Coverage Δ
#multiple	90.8% <ø> (-0.01%)	⬇️
#single	43.01% <ø> (-0.01%)	⬇️

Impacted Files	Coverage Δ
pandas/core/window.py	96.4% <0%> (-0.01%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c4994ca...3aff8d9. Read the comment docs.

[jreback]

thanks @simonjayhawkins