Spelling fixes in comments, documentation, tests and examples

By klemens <ka7@github.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

shell/ash.c

@@ -3849,7 +3849,7 @@ setjobctl(int on)
 		}
 		/* fd is a tty at this point */
 		fd = fcntl(fd, F_DUPFD, 10);
-		if (ofd >= 0) /* if it is "/dev/tty", close. If 0/1/2, dont */
+		if (ofd >= 0) /* if it is "/dev/tty", close. If 0/1/2, don't */
 			close(ofd);
 		if (fd < 0)
 			goto out; /* F_DUPFD failed */
@@ -6310,7 +6310,7 @@ static char *evalvar(char *p, int flags, struct strlist *var_str_list);
  * $@ like $* since no splitting will be performed.
  *
  * var_str_list (can be NULL) is a list of "VAR=val" strings which take precedence
- * over shell varables. Needed for "A=a B=$A; echo $B" case - we use it
+ * over shell variables. Needed for "A=a B=$A; echo $B" case - we use it
  * for correct expansion of "B=$A" word.
  */
 static void
@@ -6520,8 +6520,8 @@ scanright(char *startp, char *rmesc, char *rmescend,
 		if (try2optimize) {
 			/* Maybe we can optimize this:
 			 * if pattern ends with unescaped *, we can avoid checking
-			 * shorter strings: if "foo*" doesnt match "raw_value_of_v",
-			 * it wont match truncated "raw_value_of_" strings too.
+			 * shorter strings: if "foo*" doesn't match "raw_value_of_v",
+			 * it won't match truncated "raw_value_of_" strings too.
 			 */
 			unsigned plen = strlen(pattern);
 			/* Does it end with "*"? */
@@ -7248,7 +7248,7 @@ expandmeta(struct strlist *str /*, int flag*/)
 // Which means you need to unescape the string, right? Not so fast:
 // if there _is_ a file named "file\?" (with backslash), it is returned
 // as "file\?" too (whichever pattern you used to find it, say, "file*").
-// You DONT KNOW by looking at the result whether you need to unescape it.
+// You DON'T KNOW by looking at the result whether you need to unescape it.
 //
 // Worse, globbing of "file\?" in a directory with two files, "file?" and "file\?",
 // returns "file\?" - which is WRONG: "file\?" pattern matches "file?" file.
@@ -13088,7 +13088,7 @@ exportcmd(int argc UNUSED_PARAM, char **argv)
 	}
 	flag_off = ~flag_off;
 
-	/*if (opt_p_not_specified) - bash doesnt check this. Try "export -p NAME" */
+	/*if (opt_p_not_specified) - bash doesn't check this. Try "export -p NAME" */
 	{
 		aptr = argptr;
 		name = *aptr;

shell/ash_test/ash-misc/unicode1.tests

@@ -5,7 +5,7 @@ a=`printf "\xcc\x80"`
 # Should print 1
 echo ${#a}
 
-# A Japanese katakana charachter U+30a3
+# A Japanese katakana character U+30a3
 a=`printf "\xe3\x82\xa3"`
 # Should print 1
 echo ${#a}

shell/hush.c

@@ -1908,7 +1908,7 @@ static int check_and_run_traps(void)
 			G.count_SIGCHLD++;
 //bb_error_msg("[%d] check_and_run_traps: G.count_SIGCHLD:%d G.handled_SIGCHLD:%d", getpid(), G.count_SIGCHLD, G.handled_SIGCHLD);
 			/* Note:
-			 * We dont do 'last_sig = sig' here -> NOT returning this sig.
+			 * We don't do 'last_sig = sig' here -> NOT returning this sig.
 			 * This simplifies wait builtin a bit.
 			 */
 			break;
@@ -1917,7 +1917,7 @@ static int check_and_run_traps(void)
 			debug_printf_exec("%s: sig:%d default handling is to ignore\n", __func__, sig);
 			/* SIGTERM, SIGQUIT, SIGTTIN, SIGTTOU, SIGTSTP */
 			/* Note:
-			 * We dont do 'last_sig = sig' here -> NOT returning this sig.
+			 * We don't do 'last_sig = sig' here -> NOT returning this sig.
 			 * Example: wait is not interrupted by TERM
 			 * in interactive shell, because TERM is ignored.
 			 */
@@ -2280,7 +2280,7 @@ static void reinit_unicode_for_hush(void)
  *	AT\
  *	H\
  *	\
- * It excercises a lot of corner cases.
+ * It exercises a lot of corner cases.
  */
 static void cmdedit_update_prompt(void)
 {
@@ -5235,7 +5235,7 @@ static void o_addblock_duplicate_backslash(o_string *o, const char *str, int len
 			/* And now we want to add { or } and continue:
 			 *  o_addchr(o, c);
 			 *  continue;
-			 * luckily, just falling throught achieves this.
+			 * luckily, just falling through achieves this.
 			 */
 		}
 #endif
@@ -5830,7 +5830,7 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg)
 			arg++;
 			/* Can't just stuff it into output o_string,
 			 * expanded result may need to be globbed
-			 * and $IFS-splitted */
+			 * and $IFS-split */
 			debug_printf_subst("SUBST '%s' first_ch %x\n", arg, first_ch);
 			G.last_exitcode = process_command_subs(&subst_result, arg);
 			debug_printf_subst("SUBST RES:%d '%s'\n", G.last_exitcode, subst_result.data);
@@ -7320,7 +7320,7 @@ static int process_wait_result(struct pipe *fg_pipe, pid_t childpid, int status)
 			/* There are still running processes in the fg_pipe */
 			return -1;
 		}
-		/* It wasnt in fg_pipe, look for process in bg pipes */
+		/* It wasn't in fg_pipe, look for process in bg pipes */
 	}
 
 #if ENABLE_HUSH_JOB

shell/hush_test/hush-misc/unicode1.tests

@@ -5,7 +5,7 @@ a=`printf "\xcc\x80"`
 # Should print 1
 echo ${#a}
 
-# A Japanese katakana charachter U+30a3
+# A Japanese katakana character U+30a3
 a=`printf "\xe3\x82\xa3"`
 # Should print 1
 echo ${#a}