vim-patch:8.2.0999: moving to next sentence gets stuck on quote

Problem:    Moving to next sentence gets stuck on quote.
Solution:   When moving to the next sentence doesn't result in moving, advance
            a character and try again. (closes vim/vim#6291)
2f03e5a0a9

src/nvim/search.c

@@ -2326,9 +2326,9 @@ int findsent(Direction dir, long count)
     func = decl;
 
   while (count--) {
-    /*
+    const pos_T prev_pos = pos;
-     * if on an empty line, skip up to a non-empty line
+
-     */
+    // if on an empty line, skip up to a non-empty line
     if (gchar_pos(&pos) == NUL) {
       do {
         if ((*func)(&pos) == -1) {
@@ -2411,6 +2411,17 @@ found:
     while (!noskip && ((c = gchar_pos(&pos)) == ' ' || c == '\t'))
       if (incl(&pos) == -1)
         break;
+
+    if (equalpos(prev_pos, pos)) {
+      // didn't actually move, advance one character and try again
+      if ((*func)(&pos) == -1) {
+        if (count) {
+          return FAIL;
+        }
+        break;
+      }
+      count++;
+    }
   }
 
   setpcmark();

src/nvim/testdir/test_textobjects.vim

@@ -290,5 +290,16 @@ func! Test_sentence_with_cursor_on_delimiter()
   normal! 17|yas
   call assert_equal("A '([sentence.])'  ", @")
 
+  " don't get stuck on a quote at the start of a sentence
+  %delete _
+  call setline(1, ['A sentence.', '"A sentence"?', 'A sentence!'])
+  normal gg))
+  call assert_equal(3, getcurpos()[1])
+
+  %delete _
+  call setline(1, ['A sentence.', "'A sentence'?", 'A sentence!'])
+  normal gg))
+  call assert_equal(3, getcurpos()[1])
+
   %delete _
 endfunc