DOC: fixup code-block directives from GH26076

[jorisvandenbossche]

Forgot to change some ipython directives to code-block directives in #26076 (should have checked the travis doc build log there ..)

[codecov]

Codecov Report

Merging #26116 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #26116      +/-   ##
==========================================
- Coverage   91.99%   91.98%   -0.01%     
==========================================
  Files         175      175              
  Lines       52384    52384              
==========================================
- Hits        48189    48184       -5     
- Misses       4195     4200       +5

Flag	Coverage Δ
#multiple	90.53% <ø> (ø)	⬆️
#single	40.74% <ø> (-0.13%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	75% <0%> (-12.5%)	⬇️
pandas/core/frame.py	96.9% <0%> (-0.12%)	⬇️
pandas/util/testing.py	90.61% <0%> (-0.11%)	⬇️

---

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[codecov]

Codecov Report

Merging #26116 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #26116      +/-   ##
==========================================
- Coverage   91.99%   91.98%   -0.01%     
==========================================
  Files         175      175              
  Lines       52384    52384              
==========================================
- Hits        48189    48184       -5     
- Misses       4195     4200       +5

Flag	Coverage Δ
#multiple	90.53% <ø> (ø)	⬆️
#single	40.74% <ø> (-0.13%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	75% <0%> (-12.5%)	⬇️
pandas/core/frame.py	96.9% <0%> (-0.12%)	⬇️
pandas/util/testing.py	90.61% <0%> (-0.11%)	⬇️

---

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 68b1da7...30bb643. Read the comment docs.

[jorisvandenbossche]

Logs are looking good now.