--- a/doc/interpreter/container.txi
+++ b/doc/interpreter/container.txi
@@ -974,7 +974,7 @@
 a = @{1, [2, 3], 4, 5, 6@};
 b = [a@{1:4@}]
      @result{} b =
-         1   2   3   4
+         1   2   3   4   5
 @end group
 @end example
 

--- a/src/c-file-ptr-stream.cc
+++ b/src/c-file-ptr-stream.cc
@@ -193,6 +193,20 @@
 }
 
 int
+c_file_ptr_buf::seek (long offset, int origin)
+{
+  // gnulib::fseek doesn't seem to work, so don't use it until problem
+  // can be properly diagnosed and fixed.
+  return f ? fseek (f, offset, origin) : -1;
+}
+
+long
+c_file_ptr_buf::tell (void)
+{
+  return f ? gnulib::ftell (f) : -1;
+}
+
+int
 c_file_ptr_buf::file_close (FILE *f)
 {
   return gnulib::fclose (f);

--- a/src/c-file-ptr-stream.h
+++ b/src/c-file-ptr-stream.h
@@ -74,10 +74,9 @@
 
   int file_number () const { return f ? fileno (f) : -1; }
 
-  int seek (long offset, int origin)
-    { return f ? gnulib::fseek (f, offset, origin) : -1; }
+  int seek (long offset, int origin);
 
-  long tell (void) { return f ? gnulib::ftell (f) : -1; }
+  long tell (void);
 
   void clear (void) { if (f) clearerr (f); }
 

--- a/src/data.cc
+++ b/src/data.cc
@@ -2060,6 +2060,16 @@
   @var{a}(@var{idx1}, @var{idx2}, @dots{})\n\
 @end example\n\
 \n\
+Note that the indices do not have to be numerical. For example\n\
+\n\
+@example\n\
+  @var{a} = 1;\n\
+  @var{b} = ones (2, 3);\n\
+  numel (@var{a}, @var{b});\n\
+@end example\n\
+\n\
+will return 6, as this is the number of ways to index with @var{b}.\n\
+\n\
 This method is also called when an object appears as lvalue with cs-list\n\
 indexing, i.e., @code{object@{@dots{}@}} or @code{object(@dots{}).field}.\n\
 @seealso{size}\n\