document new readline variables "active-region-start-color" and "active-region-end-color"

tests/nquote.right

@@ -68,3 +68,13 @@ argv[1] = <^?>
 \q
 foo
 ./nquote4.sub: line 6: quux: command not found
+argv[1] = <a^A)b>
+argv[1] = <a^Ab>
+argv[1] = <^A>
+argv[1] = <\^A>
+0000000    a   $   '   \   0   1   '   b  \n   a 001   b  \n            
+0000015
+0000000    a   $   '   \   0   1   '   b  \n   a 001   b  \n            
+0000015
+0000000    A  \n   A  \n                                                
+0000004

tests/nquote.tests

@@ -139,3 +139,4 @@ ${THIS_SH} ./nquote1.sub
 ${THIS_SH} ./nquote2.sub
 ${THIS_SH} ./nquote3.sub
 ${THIS_SH} ./nquote4.sub
+${THIS_SH} ./nquote5.sub

tests/nquote5.sub

@@ -0,0 +1,22 @@
+recho $( echo a$'\01)'b )
+recho $( echo a
b )
+recho $( echo \
 )
+recho $( echo \\
 )
+
+LC_CTYPE=C
+od -c <<EOF
+a$'\01'b
+a
b
+EOF
+
+od -c <<EOF
+${none-a$'\01'b}
+${none-a
b}
+EOF
+
+V=Aa$'\01'b
+od -c <<EOF
+${V%a$'\01'b}
+${V%a
b}
+EOF
+