feat: skip updating stretch if stretching factor is zero (#181)

* style: make line length <80 throughout

* feat: skip updating stretch() if stretching factor is zero

* chore: fix codespell complaint

* fix: use correct version of rho

* style: clean up several lines and remove noqa

---------

Co-authored-by: John Halloran <jhalloran@oxy.edu>

Author: john-halloran

.codespell/ignore_words.txt

@@ -6,3 +6,6 @@ mater
 
 ;; Frobenius norm used in np.linalg.norm
 fro
+
+;; alternative spelling of socioeconomic used in code of conduct
+socio-economic

doc/source/conf.py

@@ -20,7 +20,8 @@
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
-# documentation root, use Path().resolve() to make it absolute, like shown here.
+# documentation root, use Path().resolve() to make it absolute,
+# like shown here.
 # sys.path.insert(0, str(Path(".").resolve()))
 sys.path.insert(0, str(Path("../..").resolve()))
 sys.path.insert(0, str(Path("../../src").resolve()))