add Q adverb table

Author: gfldex

doc/Language/quoting.pod6

@@ -53,7 +53,25 @@ These examples produce:
     This is still a closing curly brace → \
     =end code
 
-The other quote forms add to this basic functionality:
+The behaviour of quoting constructs can be modified with adverbs, as explained
+in detail in later sections.
+
+=begin table
+Short       Long            Meaning
+
+:x          :exec           Execute as command and return results
+:w          :words          Split result on words (no quote protection)
+
+:qq         :double         Interpolate with :s, :a, :h, :f, :c, :b
+:s          :scalar         Interpolate $ vars
+:a          :array          Interpolate @ vars
+:h          :hash           Interpolate % vars
+
+:f          :function       Interpolate & calls
+:c          :closure        Interpolate {...} expressions
+:b          :backslash      Interpolate \n, \t, etc. (implies :q at least)
+:to         :heredoc        Parse result as heredoc terminator
+=end table
 
 =head2 X<Escaping: q|quote,q;quote,' '>