@cindex curved quotes, inserting
A few common Unicode characters can be inserted via a command
starting with @kbd{C-x 8}. For example, @kbd{C-x 8 [} inserts @t{‘}
-which is Unicode code-point @code{U+2018} LEFT SINGLE QUOTATION MARK,
+which is Unicode code-point U+2018 @sc{left single quotation mark},
sometimes called a left single ``curved quote'' or ``curly quote''.
Similarly, @kbd{C-x 8 ]}, @kbd{C-x 8 @{} and @kbd{C-x 8 @}} insert the
curved quotes @t{’}, @t{“} and @t{”}, respectively. Also, a working
match disregards the diacritics that distinguish these
variants. In addition, @code{a} matches other characters that
resemble it, or have it as part of their graphical representation,
-such as @sc{u+249c parenthesized latin small letter a} and @sc{u+2100
-account of} (which looks like a small @code{a} over @code{c}).
+such as U+249C @sc{parenthesized latin small letter a} and U+2100
+@sc{account of} (which looks like a small @code{a} over @code{c}).
Similarly, the @acronym{ASCII} double-quote character @code{"} matches
all the other variants of double quotes defined by the Unicode
standard. Finally, character folding can make a sequence of one or
more characters match another sequence of a different length: for
-example, the sequence of two characters @code{ff} matches @sc{u+fb00
-latin small ligature ff}. Character sequences that are not identical,
+example, the sequence of two characters @code{ff} matches U+FB00
+@sc{latin small ligature ff}. Character sequences that are not identical,
but match under character folding are known as @dfn{equivalent
character sequences}.
equivalent in this situation; both move to the next occurrence.
You can type @kbd{C-r} at this point (see below) to alter the replaced
-text. You can also type @kbd{C-x u} to undo the replacement; this exits
-the @code{query-replace}, so if you want to do further replacement you
+text. You can also undo the replacement with the @code{undo} command
+(e.g., type @kbd{C-x u}; @pxref{Undo}); this exits the
+@code{query-replace}, so if you want to do further replacement you
must use @kbd{C-x @key{ESC} @key{ESC} @key{RET}} to restart
(@pxref{Repetition}).
this"}. Another common way is the curved quote convention, which uses
left and right single or double quotation marks `@t{like this}' or
``@t{like this}''@footnote{
-The curved single quote characters are U+2018 LEFT SINGLE QUOTATION
-MARK and U+2018 RIGHT SINGLE QUOTATION MARK; the curved double quotes
-are U+201C LEFT DOUBLE QUOTATION MARK and U+201D RIGHT DOUBLE
-QUOTATION MARK. On text terminals which cannot display these
+The curved single quote characters are U+2018 @sc{left single quotation
+mark} and U+2018 @sc{right single quotation mark}; the curved double quotes
+are U+201C @sc{left double quotation mark} and U+201D @sc{right double
+quotation mark}. On text terminals which cannot display these
characters, the Info reader might show them as the typewriter ASCII
quote characters.
}. In text files, typewriter quotes are simple and
@samp{\230}).
@item format-control
-Characters of Unicode General Category [Cf], such as @samp{U+200E}
-(Left-to-Right Mark), but excluding characters that have graphic
-images, such as @samp{U+00AD} (Soft Hyphen).
+Characters of Unicode General Category [Cf], such as U+200E
+@sc{left-to-right mark}, but excluding characters that have graphic
+images, such as U+00AD @sc{soft hyphen}.
@item no-font
Characters for which there is no suitable font, or which cannot be
@itemize @minus
@item
-Append the special character @code{U+200E}, LEFT-TO-RIGHT MARK, or
+Append the special character U+200E @sc{left-to-right mark}, or
@acronym{LRM}, to the end of each field that may have bidirectional
content, or prepend it to the beginning of the following field. The
function @code{bidi-string-mark-left-to-right}, described below, comes
in handy for this purpose. (In a right-to-left paragraph, use
-@code{U+200F}, RIGHT-TO-LEFT MARK, or @acronym{RLM}, instead.) This
+U+200F @sc{right-to-left mark}, or @acronym{RLM}, instead.) This
is one of the solutions recommended by the UBA.
@item
this property is a number. Examples of characters that have this
property include fractions, subscripts, superscripts, Roman numerals,
currency numerators, and encircled numbers. For example, the value of
-this property for the character @code{U+2155} (@sc{vulgar fraction one
-fifth}) is @code{0.2}. For characters that don't have any numeric
+this property for the character U+2155 @sc{vulgar fraction one
+fifth} is @code{0.2}. For characters that don't have any numeric
value, and for unassigned codepoints, the value is @code{nil}, which
means @acronym{NaN}.
@item special-uppercase
Corresponds to Unicode language- and context-independent special upper-casing
rules. The value of this property is a string (which may be empty). For
-example mapping for @code{U+00DF} (@sc{latin small letter sharp s}) is
+example mapping for U+00DF @sc{latin small letter sharp s} is
@code{"SS"}. For characters with no special mapping, the value is @code{nil}
which means @code{uppercase} property needs to be consulted instead.
@item special-lowercase
-Corresponds to Unicode language- and context-independent special lower-casing
-rules. The value of this property is a string (which may be empty). For
-example mapping for @code{U+0130} (@sc{latin capital letter i with dot above})
-the value is @code{"i\u0307"} (i.e. 2-character string consisting of @sc{latin
-small letter i} followed by @sc{combining dot above}). For characters with no
-special mapping, the value is @code{nil} which means @code{lowercase} property
-needs to be consulted instead.
+Corresponds to Unicode language- and context-independent special
+lower-casing rules. The value of this property is a string (which may
+be empty). For example mapping for U+0130 @sc{latin capital letter i
+with dot above} the value is @code{"i\u0307"} (i.e. 2-character string
+consisting of @sc{latin small letter i} followed by U+0307
+@sc{combining dot above}). For characters with no special mapping,
+the value is @code{nil} which means @code{lowercase} property needs to
+be consulted instead.
@item special-titlecase
Corresponds to Unicode unconditional special title-casing rules. The value of
this property is a string (which may be empty). For example mapping for
-@code{U+FB01} (@sc{latin small ligature fi}) the value is @code{"Fi"}. For
+U+FB01 @sc{latin small ligature fi} the value is @code{"Fi"}. For
characters with no special mapping, the value is @code{nil} which means
@code{titlecase} property needs to be consulted instead.
@end table
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