patch 8.2.2160: various typos

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)

Author: brammool

src/bufwrite.c

@@ -2138,7 +2138,7 @@ buf_write(
     if (!checking_conversion)
     {
 #if defined(UNIX) && defined(HAVE_FSYNC)
-	// On many journalling file systems there is a bug that causes both the
+	// On many journaling file systems there is a bug that causes both the
 	// original and the backup file to be lost when halting the system
 	// right after writing the file.  That's because only the meta-data is
 	// journalled.  Syncing the file slows down the system, but assures it

src/cindent.c

@@ -2121,7 +2121,7 @@ get_c_indent(void)
     }
 
     // #defines and so on go at the left when included in 'cinkeys',
-    // exluding pragmas when customized in 'cinoptions'
+    // excluding pragmas when customized in 'cinoptions'
     if (*theline == '#' && (*linecopy == '#' || in_cinkeys('#', ' ', TRUE)))
     {
 	char_u *directive = skipwhite(theline + 1);

src/cmdexpand.c

@@ -1049,7 +1049,7 @@ set_one_cmd_context(
 		++p;
     }
 
-    // If the cursor is touching the command, and it ends in an alpha-numeric
+    // If the cursor is touching the command, and it ends in an alphanumeric
     // character, complete the command name.
     if (*p == NUL && ASCII_ISALNUM(p[-1]))
 	return NULL;

src/eval.c

@@ -4631,7 +4631,7 @@ set_ref_in_item(
  * "numbuf" is used for a number.
  * When "copyID" is not NULL replace recursive lists and dicts with "...".
  * When both "echo_style" and "composite_val" are FALSE, put quotes around
- * stings as "string()", otherwise does not put quotes around strings, as
+ * strings as "string()", otherwise does not put quotes around strings, as
  * ":echo" displays values.
  * When "restore_copyID" is FALSE, repeated items in dictionaries and lists
  * are replaced with "...".

src/ex_cmds.c

@@ -2660,7 +2660,7 @@ do_ecmd(
 		    if (tlnum <= 0)
 			tlnum = 1L;
 		}
-		// Add BLN_NOCURWIN to avoid a new wininfo items are assocated
+		// Add BLN_NOCURWIN to avoid a new wininfo items are associated
 		// with the current window.
 		newbuf = buflist_new(ffname, sfname, tlnum,
 						    BLN_LISTED | BLN_NOCURWIN);

src/feature.h

@@ -937,7 +937,7 @@
  * +mouse_sgr		Unix only: Include code for for SGR-styled mouse.
  * +mouse_sysmouse	Unix only: Include code for FreeBSD and DragonFly
  *			console mouse handling.
- * +mouse_urxvt		Unix only: Include code for for urxvt mosue handling.
+ * +mouse_urxvt		Unix only: Include code for for urxvt mouse handling.
  * +mouse		Any mouse support (any of the above enabled).
  *			Always included, since either FEAT_MOUSE_XTERM or
  *			DOS_MOUSE is defined.

src/getchar.c

@@ -2264,7 +2264,7 @@ at_ctrl_x_key(void)
 }
 
 /*
- * Check if typebuf.tb_buf[] contains a modifer plus key that can be changed
+ * Check if typebuf.tb_buf[] contains a modifier plus key that can be changed
  * into just a key, apply that.
  * Check from typebuf.tb_buf[typebuf.tb_off] to typebuf.tb_buf[typebuf.tb_off
  * + "max_offset"].

src/gui_haiku.cc

@@ -3411,7 +3411,7 @@ gui_mch_exit(int vim_exitcode)
 	thread_id tid = gui.vimWindow->Thread();
 	gui.vimWindow->Lock();
 	gui.vimWindow->Quit();
-	// Wait until it is truely gone
+	// Wait until it is truly gone
 	int32 exitcode;
 	wait_for_thread(tid, &exitcode);
     }

src/gui_xmdlg.c

@@ -497,7 +497,7 @@ fill_lists(enum ListSpecifier fix, SharedFontSelData *data)
     }
 
     /*
-     * Now loop trough the remaining lists and set them up.
+     * Now loop through the remaining lists and set them up.
      */
     for (idx = (int)NAME; idx < (int)NONE; ++idx)
     {

src/help.c

@@ -325,7 +325,7 @@ find_help_tags(
     char_u	*s, *d;
     int		i;
     // Specific tags that either have a specific replacement or won't go
-    // throught the generic rules.
+    // through the generic rules.
     static char *(except_tbl[][2]) = {
 	{"*",		"star"},
 	{"g*",		"gstar"},
@@ -647,6 +647,8 @@ prepare_help_buffer(void)
 
     // Always set these options after jumping to a help tag, because the
     // user may have an autocommand that gets in the way.
+    // When adding an option here, also update the help file helphelp.txt.
+
     // Accept all ASCII chars for keywords, except ' ', '*', '"', '|', and
     // latin1 word characters (for translated help files).
     // Only set it when needed, buf_init_chartab() is some work.