[MRG] fix: make the documentation of _get_loss_unbalanced as a raw string (#716)

* refactor: make the documentation of _get_loss_unbalanced as a raw string

This is to avoid the following warning:
SyntaxWarning: invalid escape sequence '\m'

* Update RELEASES.md

* [MRG] docs: fix missing delimeter for left (#718)

* fix: add backslash to fix the error in the documentation

* refactor: delete space

* Update RELEASES.md

---------

Co-authored-by: Francisco Muñoz <fmunoz@ug.uchile.cl>

---------

Co-authored-by: Francisco Muñoz <fmunoz@ug.uchile.cl>
Co-authored-by: Rémi Flamary <remi.flamary@gmail.com>

Author: 3 people

RELEASES.md

@@ -7,6 +7,7 @@
 - Added feature `grad=last_step` for `ot.solvers.solve` (PR #693)
 - Automatic PR labeling and release file update check (PR #704)
 - Reorganize sub-module `ot/lp/__init__.py` into separate files (PR #714)
+- Fix warning raise when import the library (PR #716)
 - Implement projected gradient descent solvers for entropic partial FGW (PR #702)
 - Fix documentation in the module `ot.gaussian` (PR #718)
 - Refactored `ot.bregman._convolutional` to improve readability (PR #709)

ot/unbalanced/_lbfgs.py

@@ -18,7 +18,7 @@
 
 
 def _get_loss_unbalanced(a, b, c, M, reg, reg_m1, reg_m2, reg_div="kl", regm_div="kl"):
-    """
+    r"""
     Return loss function for the L-BFGS-B solver
 
     .. note:: This function will be fed into scipy.optimize, so all input arrays must be Numpy arrays.