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   MANAGE THE QUOTATION MARKS SETTING
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   PRODUCT   :  R:BASE                  VERSION      :  3.1
   CATEGORY  :  PROGRAMMING             SUBCATEGORY  :  TOOLS
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   The CVAL function requires quotation marks on literal values, so you
   need to use a dotted variable to save the QUOTES setting. For example,
   the following code, adapted from RESTORE.RMD (a program that comes
   with R:BASE), saves the current quotation mark setting in a variable
   named VQSAVE:
 
     SET VAR vq TEXT = QUOTES
     SET VAR  vqsave = (CVAL(.vq))
     SET QUOTES='
     *( Insert R:BASE program that requires single quotation marks.)
     SET QUOTES=.vqsave
 
   Use this code segment to run a program that requires single quotation
   marks inside an environment that uses some other QUOTES setting.