master c2bddf8fe7: Remove read_string_literal purify doc string hack

[Lars Ingebrigtsen]

branch: master
commit c2bddf8fe77aab1a178a5617783dd9aab68d5a76
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Remove read_string_literal purify doc string hack
    
    * src/lread.c (read_string_literal): Since we're now
    byte-compiling the loaddefs files (so doc strings come from the
    .elc files), remove the hack that make this return 0 when the
    string starts with "\\n".
---
 src/lread.c | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/src/lread.c b/src/lread.c
index 0b46a2e4ee..b7d8d9eeca 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -3056,7 +3056,6 @@ read_string_literal (char stackbuf[VLA_ELEMS 
(stackbufsize)],
   /* True if we saw an escape sequence specifying
      a single-byte character.  */
   bool force_singlebyte = false;
-  bool cancel = false;
   ptrdiff_t nchars = 0;
 
   int ch;
@@ -3085,8 +3084,6 @@ read_string_literal (char stackbuf[VLA_ELEMS 
(stackbufsize)],
            case ' ':
            case '\n':
              /* `\SPC' and `\LF' generate no characters at all.  */
-             if (p == read_buffer)
-               cancel = true;
              continue;
            default:
              UNREAD (ch);
@@ -3152,15 +3149,6 @@ read_string_literal (char stackbuf[VLA_ELEMS 
(stackbufsize)],
   if (ch < 0)
     end_of_file_error ();
 
-  /* If purifying, and string starts with \ newline,
-     return zero instead.  This is for doc strings
-     that we are really going to find in etc/DOC.nn.nn.  */
-  if (!NILP (Vpurify_flag) && NILP (Vdoc_file_name) && cancel)
-    {
-      unbind_to (count, Qnil);
-      return make_fixnum (0);
-    }
-
   if (!force_multibyte && force_singlebyte)
     {
       /* READ_BUFFER contains raw 8-bit bytes and no multibyte