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    consistency with \code{format.default}.}
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    consistency with \code{format.default}.}
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}
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}
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\details{
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\details{
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  This escapes backslash and the control characters \samp{\\a} (bell),
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  This escapes backslash and the control characters \samp{\\a} (bell),
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  \samp{\\b} (backspace), \samp{\\f} (formfeed), \samp{\\n} (line feed),
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  \samp{\\b} (backspace), \samp{\\f} (formfeed), \samp{\\n} (line feed),
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  \samp{\\r} (carriage return), \samp{\\t} (tab) and \samp{\\v} (vertical tab)
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  \samp{\\r} (carriage return), \samp{\\t} (tab) and \samp{\\v}
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  as well as any non-printable characters in a
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  (vertical tab) as well as any non-printable characters in a
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  single-byte locale, which are printed in octal notation
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  single-byte locale, which are printed in octal notation (\samp{\\xyz}
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  (\samp{\\xyz} with leading zeroes).
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  with leading zeroes).
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#ifdef unix
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  (Which characters are non-printable depends on the current locale.)
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  Which characters are non-printable depends on the current locale.
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#endif
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#ifdef windows
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  (Windows' reporting of printable characters is unreliable, so all
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  Windows' reporting of printable characters is unreliable, so there all
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  other control characters are regarded as non-printable, and all
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  other control characters are regarded as non-printable, and all
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  characters with codes 32--255 as printable in a single-byte locale.)
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  characters with codes 32--255 as printable in a single-byte locale.
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#endif
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  See \code{\link{print.default}} for how non-printable characters are
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  See \code{\link{print.default}} for how non-printable characters are
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  handled in multi-byte locales.
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  handled in multi-byte locales.
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  If \code{quote} is a single or double quote any embedded quote of the
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  If \code{quote} is a single or double quote any embedded quote of the
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  same type is escaped.  Note that justification is of the quoted
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  same type is escaped.  Note that justification is of the quoted