commit bash-20080221 snapshot

doc/bashref.texi

@@ -2454,6 +2454,14 @@ command in its environment.
 @subsection Exit Status
 @cindex exit status
 
+The exit status of an executed command is the value returned by the
+@var{waitpid} system call or equivalent function.  Exit statuses    
+fall between 0 and 255, though, as explained below, the shell may
+use values above 125 specially.  Exit statuses from shell builtins and
+compound commands are also limited to this range. Under certain
+circumstances, the shell will use special values to indicate specific
+failure modes.
+
 For the shell's purposes, a command which exits with a
 zero exit status has succeeded.
 A non-zero exit status indicates failure.
@@ -4052,6 +4060,11 @@ attempts to save all lines of a multiple-line
 command in the same history entry.  This allows
 easy re-editing of multi-line commands.
 
+@item compat31
+If set, Bash
+changes its behavior to that of version 3.1 with respect to quoted
+arguments to the conditional command's =~ operator.
+
 @item dotglob
 If set, Bash includes filenames beginning with a `.' in
 the results of filename expansion.