maint: fix doc typos

Fix typos spotted by http://github.com/lyda/misspell-check.
* configure.ac: As above.
* ocaml/examples/guestfs-ocaml.pod: Likewise.
* fish/guestfish.pod: Likewise.

configure.ac

@@ -1268,7 +1268,7 @@ echo -n "gobject introspection ............... "
 if test "x$HAVE_INTROSPECTION_TRUE" = "x"; then echo "yes"; else echo "no"; fi
 echo
 echo "If any optional component is configured 'no' when you expected 'yes'"
-echo "then you should check the preceeding messages."
+echo "then you should check the preceding messages."
 echo
 echo "Please report bugs back to the mailing list:"
 echo "http://www.redhat.com/mailman/listinfo/libguestfs"

fish/guestfish.pod

@@ -698,7 +698,7 @@ the Unix L<chmod(1)> program):
 
 Commands that return numbers usually print them in decimal, but
 some commands print numbers in other radices (eg. C<umask> prints
-the mode in octal, preceeded by C<0>).
+the mode in octal, preceded by C<0>).
 
 =head1 WILDCARDS AND GLOBBING
 
@@ -730,7 +730,7 @@ will perform a Cartesian product.
 =head1 COMMENTS
 
 Any line which starts with a I<#> character is treated as a comment
-and ignored.  The I<#> can optionally be preceeded by whitespace,
+and ignored.  The I<#> can optionally be preceded by whitespace,
 but B<not> by a command.  For example:
 
  # this is a comment
@@ -904,7 +904,7 @@ some arbitrary end marker:
  END
 
 Any string of characters can be used instead of C<END>.  The end
-marker must appear on a line of its own, without any preceeding or
+marker must appear on a line of its own, without any preceding or
 following characters (not even spaces).
 
 Note that the C<-E<lt>E<lt>> syntax only applies to parameters used to

ocaml/examples/guestfs-ocaml.pod

@@ -47,7 +47,7 @@ on the class C<Guestfs.guestfs>:
  method set_verbose : bool -> unit
 
 The object-oriented style is usually briefer, and the minor performance
-penalty isn't noticable in the general overhead of performing
+penalty isn't noticeable in the general overhead of performing
 libguestfs functions.
 
 =head2 CLOSING THE HANDLE