[PATCH] guile: Fix documentation typos.

[ludo@gnu.org (Ludovic Courtès)]

Hello,

The patch below fixes a couple of typos in the Guile API documentation.

Thanks,
Ludo’.

2014-02-16  Ludovic Courtès  <ludo@gnu.org>

	* doc/guile.texi (Writing a Guile Pretty-Printer) <example>:
	Remove 'string-begins-with' procedure.  Add 'pretty-printer'
	parameter to 'str-lookup-function' procedure.  Look for
	the "std::string<" prefix.
	(Frames In Guile): Add 'frame' parameter to 'frame-read-var'.
	Adjust description.

diff --git a/gdb/doc/guile.texi b/gdb/doc/guile.texi
index 924f97a..ceb98dc 100644
--- a/gdb/doc/guile.texi
+++ b/gdb/doc/guile.texi
@@ -1545,14 +1545,11 @@ And here is an example showing how a lookup function for the printer
 example above might be written.
 
 @smallexample
-(define (string-begins-with str prefix)
-  (= (string-prefix-length str prefix) (string-length prefix)))
-
-(define (str-lookup-function value)
+(define (str-lookup-function pretty-printer value)
   (let ((tag (type-tag (value-type value))))
     (and tag
-         (string-begins-with tag "my::string<")
-         (make-std-string-printer value))))
+         (string-prefix? "std::string<" tag)
+         (make-my-string-printer value))))
 @end smallexample
 
 Then to register this printer in the global printer list:
@@ -1893,8 +1890,8 @@ Return the frame's @code{<gdb:sal>} (symtab and line) object.
 @xref{Symbol Tables In Guile}.
 @end deffn
 
-@deffn {Scheme Procedure} frame-read-var variable @r{[}#:block block@r{]}
-Return the value of @var{variable} in this frame.  If the optional
+@deffn {Scheme Procedure} frame-read-var frame variable @r{[}#:block block@r{]}
+Return the value of @var{variable} in @var{frame}.  If the optional
 argument @var{block} is provided, search for the variable from that
 block; otherwise start at the frame's current block (which is
 determined by the frame's current program counter).  @var{variable}