Fix eachindexing and dots for NelderMead.

[pkofod]

Fixes #868

[codecov]

Codecov Report

Merging #917 (869d106) into master (2e7bcee) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

❗ Current head 869d106 differs from pull request most recent head 9bc999b. Consider uploading reports for the commit 9bc999b to get more accurate results

@@            Coverage Diff             @@
##           master     #917      +/-   ##
==========================================
- Coverage   83.69%   83.67%   -0.03%     
==========================================
  Files          43       43              
  Lines        3024     3020       -4     
==========================================
- Hits         2531     2527       -4     
  Misses        493      493              

Impacted Files	Coverage Δ
...c/multivariate/solvers/zeroth_order/nelder_mead.jl	85.25% <100.00%> (-0.37%)	⬇️

---

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 2e7bcee...9bc999b. Read the comment docs.