Allow multiple conditions for the same axis in cf.Field.indices

Author: davidhassell

Changelog.rst

@@ -6,6 +6,9 @@ Version NEXTVERSION
 * New methods to allow changing units in a chain: `cf.Field.to_units`,
   `cf.Data.to_units`
   (https://github.com/NCAS-CMS/cf-python/issues/874)
+* Allow multiple conditions for the same axis in `cf.Field.subspace`
+  and `cf.Field.indices`
+  (https://github.com/NCAS-CMS/cf-python/issues/881)
 * New dependency: ``distributed>=2025.5.1``
 
 ----

cf/field.py

@@ -12754,6 +12754,8 @@ def subspace(self):
         * Multiple domain axes may be subspaced simultaneously, and it
           doesn't matter which order they are specified in.
 
+        * Multiple criteria may be specified for the same domain axis.
+
         * Subspace criteria may be provided for size 1 domain axes that
           are not spanned by the field construct's data.