Add some doc links

threading/channels.nim

@@ -277,8 +277,9 @@ proc trySend*[T](c: Chan[T], src: sink Isolated[T]): bool {.inline.} =
   ## Instead returns after an attempt to send a message was made.
   ## 
   ## .. warning:: Blocking is still possible if another thread uses the blocking
-  ##    version of `send`/`recv` and waits for the data/space to appear in the
-  ##    channel, thus holding the internal lock to channel's buffer.
+  ##    version of the `send proc`_ / `recv proc`_ and waits for the 
+  ##    data/space to appear in the channel, thus holding the internal lock to 
+  ##    channel's buffer.
   ##
   ## Returns `false` if the message was not sent because the number of pending
   ## messages in the channel exceeded its capacity.
@@ -298,8 +299,8 @@ proc tryRecv*[T](c: Chan[T], dst: var T): bool {.inline.} =
   ## Instead returns after an attempt to receive a message was made.
   ## 
   ## .. warning:: Blocking is still possible if another thread uses the blocking
-  ##    version of `send`/`recv` and waits for the data/space to appear in the
-  ##    channel, thus holding the internal lock to channel's buffer.
+  ##    version of the `send proc`_ / `recv proc`_ and waits for the data/space to 
+  ##    appear in the channel, thus holding the internal lock to channel's buffer.
   ## 
   ## Returns `false` and does not change `dist` if no message was received.
   channelReceive(c.d, dst.addr, sizeof(T), false)