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/include/builtins.h

@@ -210,4 +210,3 @@ extern const char sh_optwhence[];
 extern const char sh_opttimes[];
 
 extern const char e_dict[];
-

src/cmd/ksh93/include/defs.h

@@ -37,7 +37,7 @@
 #endif
 #if !SHOPT_MULTIBYTE
     /*
-     * Disable multibyte without need for excessive '#if SHOPT_MULTIBYTE' peprocessor conditionals.
+     * Disable multibyte without need for excessive '#if SHOPT_MULTIBYTE' preprocessor conditionals.
      * If we redefine the maximum character size mbmax() as 1 byte, the mbwide() macro will always
      * evaluate to 0. All the other multibyte macros have multibtye code conditional upon mbwide(),
      * so the compiler should optimize all of that code away. See src/lib/libast/include/ast.h
@@ -161,7 +161,7 @@ struct shared
 	Sfio_t		*funlog;	/* for logging function definitions */ \
 	int		**fdptrs;	/* pointer to file numbers */ \
 	char		*lastarg; \
-	char		*lastpath;	/* last alsolute path found */ \
+	char		*lastpath;	/* last absolute path found */ \
 	int		path_err;	/* last error on path search */ \
 	Dt_t		*track_tree;	/* for tracked aliases*/ \
 	Dt_t		*var_base;	/* global level variables */ \
@@ -199,7 +199,7 @@ struct shared
 	char		binscript; \
 	char		deftype; \
 	char		funload; \
-	char		used_pos;	/* used postional parameter */\
+	char		used_pos;	/* used positional parameter */\
 	char		universe; \
 	char		winch; \
 	char		inarith; 	/* set when in ((...)) */ \

src/cmd/ksh93/include/edit.h

@@ -114,7 +114,7 @@ typedef struct edit
 	genchar	*e_physbuf;	/* temporary workspace buffer */
 	int	e_lbuf[LOOKAHEAD];/* pointer to look-ahead buffer */
 	int	e_fd;		/* file descriptor */
-	int	e_ttyspeed;	/* line speed, also indicates tty parms are valid */
+	int	e_ttyspeed;	/* line speed, also indicates tty parameters are valid */
 	int	e_tabcount;
 #ifdef _hdr_utime
 	ino_t	e_tty_ino;

src/cmd/ksh93/include/jobs.h

@@ -189,5 +189,4 @@ extern void	job_chldtrap(Shell_t*, const char*,int);
 #	define job_fork(p)
 #endif	/* JOBS */
 
-
 #endif /* !JOB_NFLAG */

src/cmd/ksh93/include/lexstates.h

@@ -42,7 +42,7 @@
 #define S_SPC1	21	/* special prefix characters after $ */
 #define S_SPC2	22	/* special characters after $ */
 #define S_DIG	23	/* digit character after $ */
-#define S_ALP	24	/* alpahbetic character after $ */
+#define S_ALP	24	/* alphabetic character after $ */
 #define S_LBRA	25	/* left brace after $ */
 #define S_RBRA	26	/* right brace after $ */
 #define S_PAR	27	/* set for $( */
@@ -55,7 +55,7 @@
 #define S_DOT	34	/* . char */
 #define S_META	35	/* | & ; < > inside ${...} reserved for future use */
 #define S_SPACE	S_BREAK	/* IFS space characters */
-#define S_DELIM	S_RES	/* IFS delimter characters */
+#define S_DELIM	S_RES	/* IFS delimiter characters */
 #define S_MBYTE S_NAME	/* IFS first byte of multi-byte char */
 #define S_BLNK	36	/* space or tab */
 /* The following must be the highest numbered states */

src/cmd/ksh93/include/shlex.h

@@ -155,5 +155,4 @@ extern void 		sh_syntax(Lex_t*);
     extern unsigned long        kiaentity(Lex_t*, const char*,int,int,int,int,unsigned long,int,int,const char*);
 #endif /* SHOPT_KIA */
 
-
 #endif /* !NOTSYM */