pre-commit conformity

Author: chmerdon

docs/src/restrictions.md

@@ -78,4 +78,4 @@ All restrictions are subtypes of `AbstractRestriction`. The following functions
 - `fixed_dofs(restriction)`: Get the list of fixed degrees of freedom affected by the restriction.
 - `is_timedependent(restriction)`: Returns whether the restriction is time-dependent.
 
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