zsh: fix bracketed-paste-magic

(cherry picked from commit 8f5af40)

pkgs/shells/zsh/bracketed-paste-magic.patch

@@ -0,0 +1,22 @@
+diff --git a/Functions/Zle/bracketed-paste-magic b/Functions/Zle/bracketed-paste-magic
+index 4baae82..840091b 100644
+--- a/Functions/Zle/bracketed-paste-magic
++++ b/Functions/Zle/bracketed-paste-magic
+@@ -162,7 +162,7 @@ bracketed-paste-magic() {
+
+ 	# There are active widgets.  Reprocess $PASTED as keystrokes.
+ 	NUMERIC=1
+-	zle -U - $PASTED
++	zle -U - "$PASTED"
+
+ 	# Just in case there are active undo widgets
+
+@@ -212,7 +212,7 @@ bracketed-paste-magic() {
+     # Arrange to display highlighting if necessary
+     if [[ -z $zle_highlight || -n ${(M)zle_highlight:#paste:*} ]]; then
+ 	zle -R
+-	zle .read-command && zle -U - $KEYS
++	zle .read-command && zle -U - "$KEYS"
+     fi
+ }
+

pkgs/shells/zsh/default.nix

@@ -18,6 +18,13 @@ stdenv.mkDerivation {
     sha256 = "1s3yww0mzgvpc48kp0x868mm3gbna42sbgzya0nknj0x5hn2jq3j";
   };
 
+  patches = [
+    # Bracketed-paste-magic error in Putty due to empty $PASTED variable
+    # http://www.zsh.org/mla/workers/2019/msg00808.html
+    # This patch included in the next version
+    ./bracketed-paste-magic.patch
+  ];
+
   buildInputs = [ ncurses pcre ];
 
   configureFlags = [