Fix PEP8 W391 issues (blank line at end of file).
Fix PEP8 E712 issues (comparisons to True).
Misc PEP8 fixes.
Merge pull request #4089 from cbrueffer/pep8

Fixes for various PEP8 issues.
BUG: fix buffer dtype mismatch on win-amd64

ValueError: Buffer dtype mismatch, expected 'Py_ssize_t' but got 'long'
(cherry picked from commit c1f3e25d4a3f58b7e43fcdc0f40cf4c1e8f735a2)
DOC: interpolate: fix ReST issues in interp1d docstring
DOC: interpolate: remove UnivariateSpline methods from the module docstring

Methods are available in the individual *Spline classes
DOC: correct/expand docstrings of *UnivariateSpline class methods.
ENH: Changed scipy.stats.describe output from datalen to nobs
Merge pull request #4195 from ev-br/docs_interp

improve the interpolate docs
Merge pull request #4199 from clarkfitzg/nobs

ENH: Changed scipy.stats.describe output from datalen to nobs
ENH: Add above_threshold_color option to dendrograms.
TST: Check dendrogram plot with alternate colors.
BLD: fix a number of Bento build warnings.

c_misc was first added to includes for all modules, not just when needed.

Also update .gitignore for missing generated _ellip_harm_2.h file.

[ci skip]
DOC: document scipy.optimize.RootResults attributes
Merge pull request #4202 from QuLogic/dendrogram-threshold-color

Dendrogram threshold color
Merge pull request #4207 from andyfaff/rootresults

DOC: document scipy.optimize.RootResults attributes
Merge pull request #4205 from rgommers/fix-cmisc-warnings

BLD: fix a number of Bento build warnings.
ENH: special: add inverse Box-Cox transform
GEN: special: run generate_ufuncs