doc bug:missing preposition in string searching

[Scott Lenser]

There is a preposition missing in the string searching section.

The following is a one line patch against the CVS head (which I 
hereby enter into the public domain).

Index: scheme-data.texi
===================================================================
RCS file: /cvsroot/guile/guile/guile-core/doc/ref/scheme-data.texi,v
retrieving revision 1.2
diff -U3 -r1.2 scheme-data.texi
--- scheme-data.texi    2001/08/30 20:02:13     1.2
+++ scheme-data.texi    2001/11/11 11:18:30
@@ -1689,7 +1689,7 @@
 @node String Searching
 @subsection String Searching
 
-When searching the index of a character in a string, these procedures
+When searching for the index of a character in a string, these procedures
 can be used.
 
 @deffn primitive string-index str chr [frm [to]]