Fix various minor problems and update the documentation (#237)

These are minor fixes I've accumulated over time. The following
changes are somewhat notable:

- Added a missing entry for 'typeset -s' to the man page.
- Add strftime(3) to the 'see also' section. This and the date(1)
  addition are meant to add onto the documentation for 'printf %T'.
- Removed the man page the entry for ksh reading $PWD/.profile on
  login. That feature was removed in commit aa7713c2.
- Added date(1) to the 'see also' section of the man page.
- Note that the 'hash' command can be used instead of 'alias -t' to
  workaround one of the caveats listed in the man page.
- Use an 'out of memory' error message rather than 'out of space'
  when memory allocation fails.
- Replaced backticks with quotes in some places for consistency.
- Added missing documentation for the %P date format.
- Added missing documentation for the printf %Q and %p formats
  (backported from ksh2020: https://github.com/att/ast/pull/1032).
- The comments that show each builtin's options have been updated.

src/cmd/ksh93/data/builtins.c

@@ -291,7 +291,7 @@ const char sh_set[] =
 "[C?Prevents existing regular files from being overwritten using the \b>\b "
 	"redirection operator.  The \b>|\b redirection overrides this "
 	"\bnoclobber\b option.]"
-"[G?Causes \b**\b by itself to also match all sub-directories during pathname "
+"[G?Causes \b**\b by itself to also match all subdirectories during pathname "
 	"expansion.]"
 #if SHOPT_HISTEXPAND
    "[H?Enable \b!\b-style history expansion similar to \bcsh\b.]"
@@ -961,12 +961,12 @@ const char sh_opthist[]	=
 	"maintains the ordering.]"
 "[+?When commands are edited (when the \b-l\b option is not specified), the "
 	"resulting lines will be entered at the end of the history list and "
-	"then reexecuted by the current shell.  The \b\f?\f\b command that "
+	"then re-executed by the current shell.  The \b\f?\f\b command that "
 	"caused the editing will not be entered into the history list.  If the "
 	"editor returns a non-zero exit status, this will suppress the "
-	"entry into the history list and the command reexecution.  Command "
+	"entry into the history list and the command re-execution.  Command "
 	"line variable assignments and redirections affect both the \f?\f "
-	"command and the commands that are reexecuted.]"
+	"command and the commands that are re-executed.]"
 "[+?\afirst\a and \alast\a define the range of commands. \afirst\a and "
 		"\alast\a can be one of the following:]{"
 		"[+\anumber\a?A positive number representing a command "
@@ -990,7 +990,7 @@ const char sh_opthist[]	=
 "[e]:[editor?\aeditor\a specifies the editor to use to edit the history "
 	"command.   A value of \b-\b for \aeditor\a is equivalent to "
 	"specifying the \b-s\b option.]"
-"[l?List the commands rather than editing and reexecuting them.]"
+"[l?List the commands rather than editing and re-executing them.]"
 "[N]#[num?Start at \anum\a commands back.]" 
 "[n?Suppress the command numbers when the commands are listed.]"
 #if SHOPT_HISTEXPAND
@@ -998,16 +998,16 @@ const char sh_opthist[]	=
 	"output.  All other options are ignored.]"
 #endif
 "[r?Reverse the order of the commands.]"
-"[s?Reexecute the command without invoking an editor.  In this case "
+"[s?Re-execute the command without invoking an editor.  In this case "
 	"an operand of the form \aold\a\b=\b\anew\a can be specified "
 	"to change the first occurrence of the string \aold\a in the "
-	"command to \anew\a before reexecuting the command.]"
+	"command to \anew\a before re-executing the command.]"
 
 "\n"
 "\n[first [last] ]\n"
 "\n"
-"[+EXIT STATUS?If a command is reexecuted, the exit status is that of "
-	"the command that gets reexecuted.  Otherwise, it is one of the "
+"[+EXIT STATUS?If a command is re-executed, the exit status is that of "
+	"the command that gets re-executed.  Otherwise, it is one of the "
 	"following:]{"
 	"[+0?Successfully completion of the listing.]"
 	"[+>0?An error occurred.]" 
@@ -1221,6 +1221,8 @@ const char sh_optprintf[] =
 		"formats the output for use as a URI.]"
 	"[+%P?Treat \astring\a as an extended regular expression and  "
 		"convert it to a shell pattern.]"
+	"[+%p?Convert number to hexadecimal.]"
+	"[+%Q?Convert number of seconds to readable time.]"
 	"[+%R?Treat \astring\a as an shell pattern expression and  "
 		"convert it to an extended regular expression.]"
 	"[+%T?Treat \astring\a as a date/time string and format it.  The "
@@ -1237,8 +1239,8 @@ const char sh_optprintf[] =
 			"[+d?day of month number]"
 			"[+D?date as \amm/dd/yy\a]"
 			"[+e?blank padded day of month number]"
-			"[+f?print a date with the format '\%Y.\%m.\%d-\%H:\%M:\%S']"
-			"[+F?%ISO 8601:2000 standard date format; equivalent to Y-%m-%d]"
+			"[+f?print a date with the format \b%Y.%m.%d-%H:%M:%S\b]"
+			"[+F?ISO 8601:2000 standard date format; equivalent to \b%Y-%m-%d\b]"
 			"[+g?\bls\b(1) \b-l\b recent date with \ahh:mm\a]"
 			"[+G?\bls\b(1) \b-l\b distant date with \ayyyy\a]"
 			"[+h?abbreviated month name]"
@@ -1256,9 +1258,10 @@ const char sh_optprintf[] =
 			"[+n?newline character]"
 			"[+N?nanoseconds 000000000-999999999]"
 			"[+p?meridian (e.g., \bAM\b or \bPM\b)]"
+			"[+P?lowercase meridian (e.g., \bam\b or \bpm\b)]"
 			"[+q?quarter of the year]"
 			"[+Q?\a<del>recent<del>distant<del>\a: \a<del>\a is a unique "
-				"delimter character; \arecent\a format for recent "
+				"delimiter character; \arecent\a format for recent "
 				"dates, \adistant\a format otherwise]"
 			"[+r?12-hour time as \ahh:mm:ss meridian\a]"
 			"[+R?24-hour time as \ahh:mm\a]"

src/cmd/ksh93/data/limits.c

@@ -49,7 +49,7 @@ const Limit_t	shtab_limits[] =
 "nproc",	"number of processes",	RLIMIT_NPROC,	"CHILD_MAX",	'u',	LIM_COUNT,
 "pipe",		"pipe buffer size",	RLIMIT_PIPE,	"PIPE_BUF",	'p',	LIM_BYTE,
 "rss",		"max memory size",	RLIMIT_RSS,	0,		'm',	LIM_KBYTE,
-"rtprio",	"max real time priority",RLIMIT_RTPRIO,	0,		'r',	LIM_COUNT,
+"rtprio",	"max real-time priority",RLIMIT_RTPRIO,	0,		'r',	LIM_COUNT,
 "sbsize",	"socket buffer size",	RLIMIT_SBSIZE,	"PIPE_BUF",	'b',	LIM_BYTE,
 "sigpend",	"signal queue size",	RLIMIT_SIGPENDING,"SIGQUEUE_MAX",'i',	LIM_COUNT,
 "stack",	"stack size",		RLIMIT_STACK,	0,		's',	LIM_KBYTE,

src/cmd/ksh93/data/testops.c

@@ -20,7 +20,7 @@
 #pragma prototyped
 
 /*
- * tables for the test builin [[...]] and [...]
+ * tables for the test builtin [[...]] and [...]
  */
 
 #include	<ast.h>