Fix #5298: imgmath: math_number_all causes equations to have two numbers in html

[tk0miya]

Feature or Bugfix

• Bugfix

Purpose

• refs: math_number_all = True causes equations to have two numbers in html #5298

[codecov]

Codecov Report

Merging #5304 into 1.7 will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              1.7    #5304      +/-   ##
==========================================
+ Coverage   82.04%   82.04%   +<.01%     
==========================================
  Files         283      288       +5     
  Lines       37902    38221     +319     
  Branches     5879     5933      +54     
==========================================
+ Hits        31096    31360     +264     
- Misses       5493     5540      +47     
- Partials     1313     1321       +8

Impacted Files	Coverage Δ
sphinx/ext/imgmath.py	50.94% <100%> (ø)	⬆️
sphinx/search/__init__.py	95.11% <0%> (ø)
sphinx/__init__.py	57.5% <0%> (ø)
sphinx/quickstart.py	0% <0%> (ø)
sphinx/apidoc.py	0% <0%> (ø)
sphinx/errors.py	68.42% <0%> (ø)
sphinx/builders/html.py	82.53% <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 01f4d3b...4b3fc81. Read the comment docs.