Override annotation when value is no longer significant after correction

[trevismd]

As discussed in #30, some might find useful to have the annotation "ns" plotted (instead of "* (ns)", "** (ns)"...) when a p-value is no longer to be considered significant when using a multiple comparisons correction.

This PR introduces a "correction_format" parameter for Annotator.configure(), enabling the behavior above using correction_format="replace".

It is also possible to define a custom formatting string for these cases such as correction_format="({star})", to obtain "(*)", "(**)", etc.

Note that this will not change the appearance in the printed output (obtained with verbose).

[codecov]

Codecov Report

Merging #31 (1d30a0d) into dev (c4704fb) will decrease coverage by 0.01%.
The diff coverage is 97.05%.

@@            Coverage Diff             @@
##              dev      #31      +/-   ##
==========================================
- Coverage   96.96%   96.94%   -0.02%     
==========================================
  Files          29       29              
  Lines        1845     1867      +22     
==========================================
+ Hits         1789     1810      +21     
- Misses         56       57       +1     

Impacted Files	Coverage Δ
statannotations/Annotator.py	91.60% <ø> (ø)
tests/test_pvalue_format.py	100.00% <ø> (ø)
statannotations/PValueFormat.py	96.26% <94.73%> (-0.37%)	⬇️
statannotations/_version.py	100.00% <100.00%> (ø)
statannotations/format_annotations.py	100.00% <100.00%> (ø)
statannotations/stats/StatResult.py	91.48% <100.00%> (+0.79%)	⬆️
tests/test_integrate_format_multiple.py	100.00% <100.00%> (ø)

---

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 c4704fb...1d30a0d. Read the comment docs.