fixed typo

Old_Packages/Doc23/changes.txt

@@ -1,3 +1,6 @@
+2.20    (?? May 2001)
+- fixed typo in compare_x_at_y()
+
 2.19    (1 May 2001)
 - Fix return type of Kernel::Orientation_?.
 - angle()

Old_Packages/Doc23/doc_tex/kernel/Ref/compare_x_at_y.tex

@@ -8,7 +8,7 @@
          of \ccStyle{p} on \ccStyle{h}%
          \ccTexHtml{ (Figure~\ref{fig-compare_x_at_y} (a))}{; see (a) in the 
          figure below}.
-         \ccPrecond \ccSytle{h} is not horizontal.}
+         \ccPrecond \ccStyle{h} is not horizontal.}
 
 \begin{ccTexOnly}
 \begin{figure}[h]

Packages/Kernel_23/doc_tex/kernel/Ref/compare_x_at_y.tex

@@ -8,7 +8,7 @@
          of \ccStyle{p} on \ccStyle{h}%
          \ccTexHtml{ (Figure~\ref{fig-compare_x_at_y} (a))}{; see (a) in the 
          figure below}.
-         \ccPrecond \ccSytle{h} is not horizontal.}
+         \ccPrecond \ccStyle{h} is not horizontal.}
 
 \begin{ccTexOnly}
 \begin{figure}[h]