Minor updates to the quick reference.

doc/osh-quick-ref-toc.txt

@@ -46,7 +46,7 @@ ASSIGNING VARIABLES
OIL VARIABLES

X [Keywords]      var   const   set   setglobal
                  setargv   setoption
                  setargv   setenv   setoption
X [Operators]     pass ->   rhs-assign =>
X [Compound Data] oil-array     array = [a b c]
                  splice        a = [a @middle b]
@@ -105,7 +105,7 @@ X [Interactive]   alias   unalias   bind   history   fc
X [Unsupported]   enable

OIL BUILTINS
  [I/O]           write   readline   sh-builtin
  [I/O]           write   readline   sh-builtin   sh-eval
  [External]      dirname   basename   env ?

SHELL OPTIONS
@@ -141,8 +141,8 @@ X [Shell State]   BASH_CMDS   @DIRSTACK
  [Other]         BASH_REMATCH   @PIPESTATUS

PLUGINS AND HOOKS
X [Signals]       SIGINT   SIGABRT   SIGTODO
X [Traps]         ERR   DEBUG   RETURN   EXIT
  [Signals]       SIGTERM   X SIGINT   X SIGABRT   SIG...
  [Traps]         EXIT   X ERR   X DEBUG   X RETURN
X [Words]         PS1   PS2   PS4
X [Completion]    
X [Other]         command_not_found
@@ -157,6 +157,7 @@ X [xargs]         each

OIL LIBRARIES

X [Builtin Funcs] shEvalArith()   shEvalWord()
X [getopts]       ?
X [Testing]       ?
X [Data Formats]  json   csv   tsv2