[perl #113684] Document actual prec of loop exits

These have always* had assignment precedence, such that

$a = goto $b = $c

is equivalent to

$a = (goto ($b = $c))

* I haven’t checked before perl 5.

pod/perlcheat.pod

@@ -42,7 +42,7 @@ already be overwhelming.
   || //           /m line based ^$      $      str end (bfr \n)
   .. ...          /s . includes \n      +      one or more
   ?:              /x ignore wh.space    *      zero or more
-  = += -= *= etc  /p preserve           ?      zero or one
+  = += last goto  /p preserve           ?      zero or one
   , =>            /a ASCII    /aa safe  {3,7}  repeat in range
   list ops        /l locale   /d  dual  |      alternation
   not             /u Unicode            []     character class

pod/perlfunc.pod

@@ -1620,6 +1620,11 @@ convert a core file into an executable.  That's why you should now invoke
 it as C<CORE::dump()>, if you don't want to be warned against a possible
 typo.
 
+Unlike most named operators, this has the same precedence as assignment.
+It is also exempt from the looks-like-a-function rule, so
+C<dump ("foo")."bar"> will cause "bar" to be part of the argument to
+C<dump>.
+
 Portability issues: L<perlport/dump>.
 
 =item each HASH
@@ -2917,6 +2922,11 @@ NAME needn't be the name of a subroutine; it can be a scalar variable
 containing a code reference or a block that evaluates to a code
 reference.
 
+Unlike most named operators, this has the same precedence as assignment.
+It is also exempt from the looks-like-a-function rule, so
+C<goto ("foo")."bar"> will cause "bar" to be part of the argument to
+C<goto>.
+
 =item grep BLOCK LIST
 X<grep>
 
@@ -3237,6 +3247,11 @@ exit out of such a block.
 See also L</continue> for an illustration of how C<last>, C<next>, and
 C<redo> work.
 
+Unlike most named operators, this has the same precedence as assignment.
+It is also exempt from the looks-like-a-function rule, so
+C<last ("foo")."bar"> will cause "bar" to be part of the argument to
+C<last>.
+
 =item lc EXPR
 X<lc> X<lowercase>
 
@@ -3754,6 +3769,11 @@ that executes once.  Thus C<next> will exit such a block early.
 See also L</continue> for an illustration of how C<last>, C<next>, and
 C<redo> work.
 
+Unlike most named operators, this has the same precedence as assignment.
+It is also exempt from the looks-like-a-function rule, so
+C<next ("foo")."bar"> will cause "bar" to be part of the argument to
+C<next>.
+
 =item no MODULE VERSION LIST
 X<no declarations>
 X<unimporting>
@@ -5568,6 +5588,11 @@ turn it into a looping construct.
 See also L</continue> for an illustration of how C<last>, C<next>, and
 C<redo> work.
 
+Unlike most named operators, this has the same precedence as assignment.
+It is also exempt from the looks-like-a-function rule, so
+C<redo ("foo")."bar"> will cause "bar" to be part of the argument to
+C<redo>.
+
 =item ref EXPR
 X<ref> X<reference>
 

pod/perlop.pod

@@ -48,7 +48,7 @@ values only, not array values.
     left	|| //
     nonassoc	..  ...
     right	?:
-    right	= += -= *= etc.
+    right	= += -= *= etc. goto last next redo dump
     left	, =>
     nonassoc	list operators (rightward)
     right	not