Update src/mh-core.jl

Co-authored-by: David Widmann <[email protected]>

Author: luiarthur

src/mh-core.jl

@@ -192,7 +192,7 @@ function AbstractMCMC.step(
 end
 
 """
-    is_symmetric_proposal(proposal::P) where P
+    is_symmetric_proposal(proposal)
 
 # Example: