Handle superscript

nostarch/chapter03.md

@@ -333,11 +333,11 @@ the sign matters, a number is shown with a plus sign or a minus sign; however,
 when it’s safe to assume the number is positive, it’s shown with no sign.
 Signed numbers are stored using two’s complement representation.
 
-Each signed variant can store numbers from -(2n - 1) to 2n - 1 - 1 inclusive,
-where *n* is the number of bits that variant uses. So an `i8` can store numbers
-from -(27) to 27 - 1, which equals -128 to 127. Unsigned variants can store
-numbers from 0 to 2n - 1, so a `u8` can store numbers from 0 to 28 - 1, which
-equals 0 to 255.
+Each signed variant can store numbers from -(2<sup>n - 1</sup>) to 2<sup>n -
+1</sup> - 1 inclusive, where *n* is the number of bits that variant uses. So an
+`i8` can store numbers from -(2<sup>7</sup>) to 2<sup>7</sup> - 1, which equals
+-128 to 127. Unsigned variants can store numbers from 0 to 2<sup>n</sup> - 1,
+so a `u8` can store numbers from 0 to 2<sup>8</sup> - 1, which equals 0 to 255.
 
 Additionally, the `isize` and `usize` types depend on the architecture of the
 computer your program is running on, which is denoted in the table as “arch”:

tools/docx-to-md.xsl

@@ -333,6 +333,16 @@ Unmatched: <xsl:value-of select="w:pPr/w:pStyle/@w:val" />
         </xsl:choose>
     </xsl:template>
 
+    <xsl:template match="w:r[w:rPr/w:rStyle[@w:val = 'Superscript']]">
+        <xsl:if test="not(preceding-sibling::*[1][self::w:r]) or preceding-sibling::w:r[1][not(w:t) or not(w:rPr/w:rStyle/@w:val = 'Superscript')]">
+            <xsl:text>&lt;sup></xsl:text>
+        </xsl:if>
+        <xsl:value-of select="w:t" />
+        <xsl:if test="not(following-sibling::*[1][self::w:r]) or following-sibling::w:r[1][not(w:t) or not(w:rPr/w:rStyle/@w:val = 'Superscript')]">
+            <xsl:text>&lt;/sup></xsl:text>
+        </xsl:if>
+    </xsl:template>
+
     <xsl:template match="w:r">
         <xsl:value-of select="w:t" />
     </xsl:template>