patch 8.2.3744: E854 is not tested; some spelling suggestions are not tested

Problem:    E854 is not tested; some spelling suggestions are not tested.
Solution:   Add a couple of tests. (Dominique Pellé, closes #9279)
diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index 585b199..6fc4564 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -136,6 +136,12 @@
   set path&
 endfunc
 
+func Test_path_too_long()
+  exe 'set path=' .. repeat('x', 10000)
+  call assert_fails('find x', 'E854:')
+  set path&
+endfunc
+
 func Test_signcolumn()
   CheckFeature signs
   call assert_equal("auto", &signcolumn)
diff --git a/src/testdir/test_spell.vim b/src/testdir/test_spell.vim
index b7437fd..3c32450 100644
--- a/src/testdir/test_spell.vim
+++ b/src/testdir/test_spell.vim
@@ -267,6 +267,11 @@
   call assert_equal(['Third'], spellsuggest('THird', 1))
   call assert_equal(['All'],      spellsuggest('ALl', 1))
 
+  " Special suggestion for repeated 'the the'.
+  call assert_inrange(0, 2, index(spellsuggest('the the',   3), 'the'))
+  call assert_inrange(0, 2, index(spellsuggest('the   the', 3), 'the'))
+  call assert_inrange(0, 2, index(spellsuggest('The the',   3), 'The'))
+
   call assert_fails("call spellsuggest('maxch', [])", 'E745:')
   call assert_fails("call spellsuggest('maxch', 2, [])", 'E745:')
 
diff --git a/src/version.c b/src/version.c
index cd7a964..da1bc2d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3744,
+/**/
     3743,
 /**/
     3742,