docs: fix typos (#18866)

docs: fix typos and similarly insignificant changes

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Co-authored-by: smjonas <jonas.strittmatter@gmx.de>
Co-authored-by: kanreki <32443233+kanreki@users.noreply.github.com>

src/nvim/api/command.c

@@ -650,7 +650,7 @@ static bool string_iswhite(String str)
       // Found a non-whitespace character
       return false;
     } else if (str.data[i] == NUL) {
-      // Terminate at first occurence of a NUL character
+      // Terminate at first occurrence of a NUL character
       break;
     }
   }

src/nvim/globals.h

@@ -709,7 +709,7 @@ EXTERN typebuf_T typebuf INIT(= { NULL, NULL, 0, 0, 0, 0, 0, 0, 0 });
 EXTERN int ex_normal_busy INIT(= 0);     // recursiveness of ex_normal()
 EXTERN int ex_normal_lock INIT(= 0);     // forbid use of ex_normal()
 EXTERN int ignore_script INIT(= false);  // ignore script input
-EXTERN int stop_insert_mode;             // for ":stopinsert" and 'insertmode'
+EXTERN int stop_insert_mode;             // for ":stopinsert"
 EXTERN bool KeyTyped;                    // true if user typed current char
 EXTERN int KeyStuffed;                   // true if current char from stuffbuf
 EXTERN int maptick INIT(= 0);            // tick for each non-mapped char

src/nvim/memory.c

@@ -529,7 +529,7 @@ void time_to_bytes(time_t time_, uint8_t buf[8])
 void arena_start(Arena *arena, ArenaMem *reuse_blk)
 {
   if (reuse_blk && *reuse_blk) {
-    arena->cur_blk = (char *)*reuse_blk;
+    arena->cur_blk = (char *)(*reuse_blk);
     *reuse_blk = NULL;
   } else {
     arena->cur_blk = xmalloc(ARENA_BLOCK_SIZE);

src/nvim/menu.c

@@ -453,7 +453,6 @@ static int add_menu_path(const char *const menu_path, vimmenu_T *menuarg, const
           if (c == Ctrl_C) {
             int len = (int)STRLEN(menu->strings[i]);
 
-            // Append CTRL-\ CTRL-G to obey 'insertmode'.
             menu->strings[i][len] = Ctrl_BSL;
             menu->strings[i][len + 1] = Ctrl_G;
             menu->strings[i][len + 2] = NUL;

src/nvim/normal.c

@@ -998,9 +998,8 @@ static int normal_execute(VimState *state, int key)
   // In Select mode, typed text replaces the selection.
   if (VIsual_active && VIsual_select && (vim_isprintc(s->c)
                                          || s->c == NL || s->c == CAR || s->c == K_KENTER)) {
-    // Fake a "c"hange command.  When "restart_edit" is set (e.g., because
-    // 'insertmode' is set) fake a "d"elete command, Insert mode will
-    // restart automatically.
+    // Fake a "c"hange command.
+    // When "restart_edit" is set fake a "d"elete command, Insert mode will restart automatically.
     // Insert the typed character in the typeahead buffer, so that it can
     // be mapped in Insert mode.  Required for ":lmap" to work.
     int len = ins_char_typebuf(vgetc_char, vgetc_mod_mask);
@@ -6772,8 +6771,6 @@ static void nv_esc(cmdarg_T *cap)
       }
     }
 
-    // Don't reset "restart_edit" when 'insertmode' is set, it won't be
-    // set again below when halfway through a mapping.
     restart_edit = 0;
 
     if (cmdwin_type != 0) {

src/nvim/ops.c

@@ -6666,9 +6666,8 @@ void do_pending_operator(cmdarg_T *cap, int old_col, bool gui_yank)
         CancelRedo();
       } else {
         // This is a new edit command, not a restart.  Need to
-        // remember it to make 'insertmode' work with mappings for
-        // Visual mode.  But do this only once and not when typed and
-        // 'insertmode' isn't set.
+        // remember it to make i_CTRL-O work with mappings for
+        // Visual mode.  But do this only once and not when typed.
         if (!KeyTyped) {
           restart_edit_save = restart_edit;
         } else {
@@ -6760,7 +6759,7 @@ void do_pending_operator(cmdarg_T *cap, int old_col, bool gui_yank)
         CancelRedo();
       } else {
         // This is a new edit command, not a restart.  Need to
-        // remember it to make 'insertmode' work with mappings for
+        // remember it to make i_CTRL-O work with mappings for
         // Visual mode.  But do this only once.
         restart_edit_save = restart_edit;
         restart_edit = 0;

src/nvim/option.c

@@ -4593,7 +4593,7 @@ static char *set_num_option(int opt_idx, char_u *varp, long value, char *errbuf,
   } else if (pp == &curwin->w_p_nuw) {
     curwin->w_nrwidth_line_count = 0;
   } else if (pp == &curwin->w_p_winbl && value != old_value) {
-    // 'floatblend'
+    // 'winblend'
     curwin->w_p_winbl = MAX(MIN(curwin->w_p_winbl, 100), 0);
     curwin->w_hl_needs_update = true;
     check_blending(curwin);