Address rh_from_tdew review wording

Author: gaoflow

docs/sphinx/source/whatsnew/v0.15.2.rst

@@ -58,8 +58,8 @@ Documentation
  :py:func:`pvlib.clearsky.lookup_linke_turbidity` (:issue:`2598`, :pull:`2746`)
 * Clarifies the variable naming, comments and references in
   :py:func:`pvlib.atmosphere.rh_from_tdew` (and the related comments in
-  :py:func:`pvlib.atmosphere.tdew_from_rh`) so the actual and saturation vapor
-  pressures are no longer swapped in the source. The returned values are
+  :py:func:`pvlib.atmosphere.tdew_from_rh`) related to the actual
+  and saturation vapor pressures. Function output is
   unchanged. (:issue:`2734`, :pull:`2782`)
 
 

pvlib/atmosphere.py

@@ -365,9 +365,9 @@ def rh_from_tdew(temp_air, temp_dew, coeff=(6.112, 17.62, 243.12)):
 
     Notes
     -----
-    Relative humidity is computed as ``100 * e / es``, where the actual vapor
-    pressure ``e`` is the saturation vapor pressure at the dew point and the
-    saturation vapor pressure ``es`` is evaluated at the air temperature, both
+    Relative humidity is computed as ``100 * e / es``, where ``e`` is the
+    saturation vapor pressure at the dew point temperature, and ``es``
+    is the saturation vapor pressure at the air temperature, both
     from the Magnus equation ``A * exp(B * T / (C + T))``. The default
     coefficients ``(A, B, C) = (6.112, 17.62, 243.12)`` are the WMO-recommended
     Magnus form for saturation over liquid water, valid for temperatures from