docs: small fixes (#35791)

Close #34938
Close #35030
Close #35233
Close #35259
Close #35290
Close #35433
Close #35541
Close #35766
Close #35792

Co-authored-by: huylg <45591413+huylg@users.noreply.github.com>
Co-authored-by: Jason Del Ponte <961963+jasdel@users.noreply.github.com>
Co-authored-by: sooriya <74165167+thuvasooriya@users.noreply.github.com>
Co-authored-by: Andrew Braxton <andrewcbraxton@gmail.com>
Co-authored-by: Enric Calabuig <enric.calabuig@gmail.com>
Co-authored-by: Augusto César Dias <augusto.c.dias@gmail.com>
Co-authored-by: David Sierra DiazGranados <davidsierradz@gmail.com>
Co-authored-by: Stepan Nikitin <90522882+vectravox@users.noreply.github.com>
Co-authored-by: Emilien Breton <bricktech2000@gmail.com>

src/nvim/eval.lua

@@ -3854,7 +3854,7 @@ M.funcs = {
     ]=],
     name = 'getcmdtype',
     params = {},
-    returns = "':'|'>'|'/'|'?'|'@'|'-'|'='",
+    returns = "':'|'>'|'/'|'?'|'@'|'-'|'='|''",
     signature = 'getcmdtype()',
   },
   getcmdwintype = {
@@ -3865,7 +3865,7 @@ M.funcs = {
     ]=],
     name = 'getcmdwintype',
     params = {},
-    returns = "':'|'>'|'/'|'?'|'@'|'-'|'='",
+    returns = "':'|'>'|'/'|'?'|'@'|'-'|'='|''",
     signature = 'getcmdwintype()',
   },
   getcompletion = {

src/nvim/insexpand.c

@@ -3026,7 +3026,7 @@ int set_cpt_callbacks(optset_T *args)
     }
   }
 
-  if (!local) {  // ':set' used insted of ':setlocal'
+  if (!local) {  // ':set' used instead of ':setlocal'
     // Cache the callback array
     copy_cpt_callbacks(&cpt_cb, &cpt_cb_count, curbuf->b_p_cpt_cb,
                        curbuf->b_p_cpt_count);

src/nvim/lua/executor.h

@@ -42,7 +42,7 @@ typedef enum {
   kRetNilBool,  ///< NIL preserved as such, other values return their booleanness
                 ///< Should also be used when return value is ignored, as it is allocation-free
   kRetLuaref,   ///< return value becomes a single Luaref, regardless of type (except NIL)
-  kRetMulti,    ///< like kRetObject but return muliple return values as an Array
+  kRetMulti,    ///< like kRetObject but return multiple return values as an Array
 } LuaRetMode;
 
 /// Maximum number of errors in vim.ui_attach() and decor provider callbacks.

src/nvim/message.c

@@ -3290,7 +3290,7 @@ void msg_ext_ui_flush(void)
 
     ui_call_msg_show(cstr_as_string(msg_ext_kind), *tofree, msg_ext_overwrite, msg_ext_history,
                      msg_ext_append, msg_ext_id);
-    // clear info after emiting message.
+    // clear info after emitting message.
     if (msg_ext_history) {
       api_free_array(*tofree);
     } else {

src/nvim/options.lua

@@ -2334,7 +2334,7 @@ local options = {
         Each anchor line splits the buffer (the split happens above the
         anchor), with each part being diff'ed separately before the final
         result is joined.  When more than one {address} are provided, the
-        anchors will be sorted interally by line number.  If using buffer
+        anchors will be sorted internally by line number.  If using buffer
         local options, each buffer should have the same number of anchors
         (extra anchors will be ignored).  This option is only used when
         'diffopt' has "anchor" set.  See |diff-anchors| for more details and