fix example for the interppointstofld

(cherry picked from commit 223c5f60)

Conflicts:
	docs/user-guide/utilities/fieldconvert.tex

docs/user-guide/utilities/fieldconvert.tex

@@ -490,7 +490,7 @@ In order to interpolate 1D data to a $n$D field, specify the matching coordinate
 the output field using the \inltt{interpcoord} argument:
 %
 \begin{lstlisting}[style=BashInputStyle]
-FieldConvert -m interppointdatatofld:interppointdatatofld=1 3D-file1.xml \
+FieldConvert -m interppointdatatofld:interpcoord=1 3D-file1.xml \
 		1D-file1.pts 3D-file1.fld
 \end{lstlisting}
 %