Variable renaming

hdinterval.py

@@ -58,8 +58,8 @@ class HDInterval:
         if any(math.isclose(x, target, abs_tol=tolerance) for x in interval):
             return ci
 
-        plus_minus = op.sub if target in interval else op.add
-        ci = plus_minus(ci, jump)
+        adjust = op.sub if target in interval else op.add
+        ci = adjust(ci, jump)
         jump /= 2
 
         return self._at(target, tolerance, ci, jump)