diff -udprP mutt-1.12.1.orig/PATCHES mutt-1.12.1/PATCHES
--- mutt-1.12.1.orig/PATCHES	2017-12-03 05:10:17.000000000 +0200
+++ mutt-1.12.1/PATCHES	2019-08-11 19:32:51.176165992 +0300
@@ -0,0 +1 @@
+vvv.quote
diff -udprP mutt-1.12.1.orig/handler.c mutt-1.12.1/handler.c
--- mutt-1.12.1.orig/handler.c	2019-05-31 19:21:33.000000000 +0300
+++ mutt-1.12.1/handler.c	2019-08-11 19:32:51.177165977 +0300
@@ -1593,7 +1593,31 @@ static int text_plain_handler (BODY *b,
 	buf[--l] = 0;
     }
     if (s->prefix)
-      state_puts (s->prefix, s);
+    {
+      int i;
+      char qbuf[2 * LONG_STRING];
+      int j = 0, offset = 0;
+      regmatch_t pmatch[1];
+
+      while (regexec ((regex_t *) QuoteRegexp.rx, &buf[offset], 1, pmatch, 0) == 0)
+	offset += pmatch->rm_eo;
+
+      if (!option (OPTQUOTEEMPTY) && !*buf)
+	strcpy (qbuf, buf);
+      else if (option (OPTQUOTEQUOTED) && offset)
+      {
+	for (i = 0; i < offset; i++)
+	  if (buf[i] != ' ')
+	    j = i;
+	strncpy (qbuf, buf, j + 1);
+	strcpy (qbuf + j + 1, buf + j);
+      }
+      else
+	snprintf (qbuf, sizeof (qbuf), "%s%s", NONULL(s->prefix), buf);
+
+      state_puts (qbuf, s);
+    }
+    else
     state_puts (buf, s);
     state_putc ('\n', s);
   }
@@ -1779,7 +1803,7 @@ int mutt_body_handler (BODY *b, STATE *s
        */
       if ((WithCrypto & APPLICATION_PGP) && mutt_is_application_pgp (b))
 	encrypted_handler = handler = crypt_pgp_application_pgp_handler;
-      else if (option(OPTREFLOWTEXT) && ascii_strcasecmp ("flowed", mutt_get_parameter ("format", b->parameter)) == 0)
+      else if (option(OPTREFLOWTEXT) && ascii_strcasecmp ("flowed", mutt_get_parameter ("format", b->parameter)) == 0 && !s->prefix)
 	handler = rfc3676_handler;
       else
 	handler = text_plain_handler;
--- mutt-2.0.6/init.h.orig	2021-04-07 17:27:35.690778943 +0000
+++ mutt-2.0.6/init.h	2021-04-07 17:29:10.704113619 +0000
@@ -2966,6 +2966,19 @@
   ** have no effect, and if it is set to \fIask-yes\fP or \fIask-no\fP, you are
   ** prompted for confirmation when you try to quit.
   */
+  { "quote_empty",     DT_BOOL, R_NONE, OPTQUOTEEMPTY, 1 },
+  /*
+  ** .pp
+  ** Controls whether or not empty lines will be quoted using
+  ** ``$indent_string''.
+  */
+  { "quote_quoted",    DT_BOOL, R_NONE, OPTQUOTEQUOTED, 0 },
+  /*
+  ** .pp
+  ** Controls how quoted lines will be quoted. If set, one quote
+  ** character will be added to the end of existing prefix.  Otherwise,
+  ** quoted lines will be prepended by ``$indent_string''.
+  */
   { "quote_regexp",	DT_RX,	 R_PAGER, {.p=&QuoteRegexp}, {.p="^([ \t]*[|>:}#])+"} },
   /*
   ** .pp
diff -udprP mutt-1.12.1.orig/mutt.h mutt-1.12.1/mutt.h
--- mutt-1.12.1.orig/mutt.h	2019-06-14 04:29:29.000000000 +0300
+++ mutt-1.12.1/mutt.h	2019-08-11 19:32:51.179165947 +0300
@@ -479,6 +479,8 @@ enum
   OPTPRINTDECODE,
   OPTPRINTSPLIT,
   OPTPROMPTAFTER,
+  OPTQUOTEEMPTY,
+  OPTQUOTEQUOTED,
   OPTREADONLY,
   OPTREFLOWSPACEQUOTES,
   OPTREFLOWTEXT,