patch 8.1.0083: "is" and "as" have trouble with quoted punctuation

Problem:    "is" and "as" have trouble with quoted punctuation.
Solution:   Check for punctuation before a quote. (Jason Franklin)

src/search.c

@@ -2707,10 +2707,11 @@ showmatch(
}

/*
 * findsent(dir, count) - Find the start of the next sentence in direction
 * "dir" Sentences are supposed to end in ".", "!" or "?" followed by white
 * space or a line break. Also stop at an empty line.
 * Return OK if the next sentence was found.
 * Find the start of the next sentence, searching in the direction specified
 * by the "dir" argument.  The cursor is positioned on the start of the next
 * sentence when found.  If the next sentence is found, return OK.  Return FAIL
 * otherwise.  See ":h sentence" for the precise definition of a "sentence"
 * text object.
 */
    int
findsent(int dir, long count)
@@ -2758,26 +2759,25 @@ findsent(int dir, long count)
	else if (dir == BACKWARD)
	    decl(&pos);

	/* go back to the previous non-blank char */
	// go back to the previous non-white non-punctuation character
	found_dot = FALSE;
	while ((c = gchar_pos(&pos)) == ' ' || c == '\t' ||
	     (dir == BACKWARD && vim_strchr((char_u *)".!?)]\"'", c) != NULL))
	while (c = gchar_pos(&pos), VIM_ISWHITE(c)
				|| vim_strchr((char_u *)".!?)]\"'", c) != NULL)
	{
	    if (vim_strchr((char_u *)".!?", c) != NULL)
	    {
		/* Only skip over a '.', '!' and '?' once. */
		if (found_dot)
		    break;
	    tpos = pos;
	    if (decl(&tpos) == -1 || (LINEEMPTY(tpos.lnum) && dir == FORWARD))
		break;

	    if (found_dot)
		break;
	    if (vim_strchr((char_u *) ".!?", c) != NULL)
		found_dot = TRUE;
	    }
	    if (decl(&pos) == -1)

	    if (vim_strchr((char_u *) ")]\"'", c) != NULL
		&& vim_strchr((char_u *) ".!?)]\"'", gchar_pos(&tpos)) == NULL)
		break;
	    /* when going forward: Stop in front of empty line */
	    if (LINEEMPTY(pos.lnum) && dir == FORWARD)
	    {
		incl(&pos);
		goto found;
	    }

	    decl(&pos);
	}

	/* remember the line where the search started */

src/testdir/test_textobjects.vim

@@ -165,3 +165,78 @@ x
  norm it
  q!
endfunc

func Test_sentence()
  enew!
  call setline(1, 'A sentence.  A sentence?  A sentence!')

  normal yis
  call assert_equal('A sentence.', @")
  normal yas
  call assert_equal('A sentence.  ', @")

  normal )

  normal yis
  call assert_equal('A sentence?', @")
  normal yas
  call assert_equal('A sentence?  ', @")

  normal )

  normal yis
  call assert_equal('A sentence!', @")
  normal yas
  call assert_equal('  A sentence!', @")

  normal 0
  normal 2yis
  call assert_equal('A sentence.  ', @")
  normal 3yis
  call assert_equal('A sentence.  A sentence?', @")
  normal 2yas
  call assert_equal('A sentence.  A sentence?  ', @")

  %delete _
endfunc

func Test_sentence_with_quotes()
  enew!
  call setline(1, 'A "sentence."  A sentence.')

  normal yis
  call assert_equal('A "sentence."', @")
  normal yas
  call assert_equal('A "sentence."  ', @")

  normal )

  normal yis
  call assert_equal('A sentence.', @")
  normal yas
  call assert_equal('  A sentence.', @")

  %delete _
endfunc

func! Test_sentence_with_cursor_on_delimiter()
  enew!
  call setline(1, "A '([sentence.])'  A sentence.")

  normal! 15|yis
  call assert_equal("A '([sentence.])'", @")
  normal! 15|yas
  call assert_equal("A '([sentence.])'  ", @")

  normal! 16|yis
  call assert_equal("A '([sentence.])'", @")
  normal! 16|yas
  call assert_equal("A '([sentence.])'  ", @")

  normal! 17|yis
  call assert_equal("A '([sentence.])'", @")
  normal! 17|yas
  call assert_equal("A '([sentence.])'  ", @")

  %delete _
endfunc

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =

static int included_patches[] =
{   /* Add new patch number below this line */
/**/
    83,
/**/
    82,
/**/