Editing awk nawk oawk

in 1977 there was awk.\\ this page attempts to explain the history of awk.\\ the 1978 7th Edition awk(1) man pages and report are here:\\ http://syl7ce6.yossman.net/fotc/ then they enhanced it and wrote a book.\\ to avoid confusion, the original was called oawk\\ and the new version nawk.\\ it has been a major source of confusion ever since.\\ the awk book from 1988\\ http://www.cs.bell-labs.com/cm/cs/awkbook/index.html\\ page v: original in 1977 / new version in 1985\\ page vi: This version in System V Rel 3.1\\ page 80: new things added\\     functions: close system atan2 sin cos rand srand match sub gsub\\     vars: ARC ARGV FNR RSTART RLENGTH SUBSEP\\     keywords: do delete function return\\ the latest One True awk:\\ http://www.cs.princeton.edu/~bwk/btl.mirror/index.html\\ from file FIXES - lists additions/changes since the awk book\\ toupper() tolower() \\ \a ("alert"), \v (vertical tab), \xhhh (hexadecimal), \\ ENVIRON[] \\ comand line: -v x=1 -v y=2\\ CONVFMT\\ nextfile\\ posix character class names like [:digit:]\\ length(arrayname) \\ undocumented command line switch -d dumps debug info.\\ valid filenames /dev/stdin /dev/stdout /dev/stderr\\ {{{awk can use ** or **= in place of ^ for exponention. }}} array SYMTAB holds info, eg: {{{awk BEGIN { _print_SYMTAB(); exit(0); } function _print_SYMTAB( varname, fmt) { fmt = "SYMTAB['%s'] = '%s'\n"; for(varname in SYMTAB) \ if ((varname != "ENVIRON") && (varname != "ARGV") \ && (varname != "SYMTAB") \ && (varname != "_print_SYMTAB")) \ printf(fmt, varname, SYMTAB[varname]) > "/dev/stderr"; #: can not access array or function names return(1); } }}}

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This change is a minor edit.

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