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+======Synopsis:======
+__push__ <variable name> <word> \\
+__pop__  <variable name>
+======Description:======
+__PUSH__ appends the given word to the given variable, padded
+with a single space.  The variable name itself may not contain a
+leading '$'; the command uses the variable itself, not the expanded
+contents.  If the variable does not exist, it is created containing
+the given word(s) (just as if [[ASSIGN]] were used).
+Just as with the [[push]] function, if [[xdebug]] dword is turned on, then
+<word> is treated as **one word** and it will be double quoted by the client
+before it is appended to the variable.  If [[xdebug]] dword is turned off,
+then you get the epic4 behavior.
+======Aliases:======
+__POP__ is the exact opposite of __PUSH__, in that it pops off the last word
+in the variable.  If there is only one word in the variable, the
+variable is deleted.  Both __PUSH__ and __POP__ are functionally equivalent
+to the $[[push function|push]]() and $[[pop function|pop]]() functions, respectively.