Document no worries pragma

Rakudo impl: rakudo/rakudo@f5b4d89fbb
Spec:        Raku/roast@5c91d6803b

doc/Language/pragmas.pod6

@@ -136,7 +136,23 @@ for certain sections of code.
 =item X<B<variables>|variables>
  L<Defined Variables Pragma|/language/variables#Default_Defined_Variables_Pragma>
 
-=item X<B<worries>|worries> [TBD]
+=item X<B<worries>|worries>
+
+Lexically controls whether compile-time warnings generated by the
+compiler get shown. Enabled by default.
+
+    =begin code :lang<text>
+    $ perl6 -e 'say :foo<>.Pair'
+    Potential difficulties:
+      Pair with <> really means an empty list, not null string; use :foo('') to represent the null string,
+        or :foo() to represent the empty list more accurately
+      at -e:1
+      ------> say :foo<>⏏.Pair
+    foo => Nil
+
+    $ perl6 -e 'no worries; say :foo<>.Pair'
+    foo => Nil
+    =end
 
 =item Other pragma under discussion