docs: fix trailing comma in links

lib/pure/collections/intsets.nim

@@ -363,7 +363,7 @@ proc isNil*(x: IntSet): bool {.inline.} = x.head.isNil and x.elems == 0
 
 proc assign*(dest: var IntSet, src: IntSet) =
   ## Copies `src` to `dest`.
-  ## `dest` does not need to be initialized by `initIntSet proc <#initIntSet,>`_.
+  ## `dest` does not need to be initialized by `initIntSet proc <#initIntSet>`_.
   runnableExamples:
     var
       a = initIntSet()

lib/pure/collections/lists.nim

@@ -93,25 +93,25 @@ type
 
   SinglyLinkedList*[T] = object ## A singly linked list.
     ##
-    ## Use `initSinglyLinkedList proc <#initSinglyLinkedList,>`_ to create
+    ## Use `initSinglyLinkedList proc <#initSinglyLinkedList>`_ to create
     ## a new empty list.
     head*, tail*: SinglyLinkedNode[T]
 
   DoublyLinkedList*[T] = object ## A doubly linked list.
     ##
-    ## Use `initDoublyLinkedList proc <#initDoublyLinkedList,>`_ to create
+    ## Use `initDoublyLinkedList proc <#initDoublyLinkedList>`_ to create
     ## a new empty list.
     head*, tail*: DoublyLinkedNode[T]
 
   SinglyLinkedRing*[T] = object ## A singly linked ring.
     ##
-    ## Use `initSinglyLinkedRing proc <#initSinglyLinkedRing,>`_ to create
+    ## Use `initSinglyLinkedRing proc <#initSinglyLinkedRing>`_ to create
     ## a new empty ring.
     head*, tail*: SinglyLinkedNode[T]
 
   DoublyLinkedRing*[T] = object ## A doubly linked ring.
     ##
-    ## Use `initDoublyLinkedRing proc <#initDoublyLinkedRing,>`_ to create
+    ## Use `initDoublyLinkedRing proc <#initDoublyLinkedRing>`_ to create
     ## a new empty ring.
     head*: DoublyLinkedNode[T]