--- Coro/README	2017/07/14 13:14:32	1.39
+++ Coro/README	2017/08/31 16:28:49	1.40
@@ -653,8 +653,8 @@
         Returns true iff this Coro object has been suspended. Suspended
         Coros will not ever be scheduled.
 
-    $coro->cancel (arg...)
-        Terminates the given Coro thread and makes it return the given
+    $coro->cancel ($arg...)
+        Terminate the given Coro thread and make it return the given
         arguments as status (default: an empty list). Never returns if the
         Coro is the current Coro.
 
@@ -699,13 +699,18 @@
         method, and therefore, it might fail. It is also considerably slower
         than "cancel" or "terminate".
 
-        A thread is in a safe-cancellable state if it either hasn't been run
-        yet, or it has no C context attached and is inside an SLF function.
-
-        The latter two basically mean that the thread isn't currently inside
-        a perl callback called from some C function (usually via some XS
-        modules) and isn't currently executing inside some C function itself
-        (via Coro's XS API).
+        A thread is in a safe-cancellable state if it either has never been
+        run yet, has already been canceled/terminated or otherwise
+        destroyed, or has no C context attached and is inside an SLF
+        function.
+
+        The first two states are trivial - a thread that hasnot started or
+        has already finished is safe to cancel.
+
+        The last state basically means that the thread isn't currently
+        inside a perl callback called from some C function (usually via some
+        XS modules) and isn't currently executing inside some C function
+        itself (via Coro's XS API).
 
         This call returns true when it could cancel the thread, or croaks
         with an error otherwise (i.e. it either returns true or doesn't