fix minor typos

lib/Type/Proc.pod

@@ -6,7 +6,7 @@
 
     class Proc { ... }
 
-C<Proc> is a representation of a an invocation of an external
+C<Proc> is a representation of an invocation of an external
 process. It provides access to the input, output and error stream as well as
 the exit code. It is typically created through the C<run> subroutine:
 
@@ -50,15 +50,15 @@ second command, you can do
             *@args
     )  returns Proc:D
 
-C<new> creates a new C<Proc> object, whereas C<run> creates one, and spwans it
+C<new> creates a new C<Proc> object, whereas C<run> creates one, and spawns it
 with the command and arguments provided in C<@args>.
 
 C<$in>, C<$out> and C<$err> are the three
 standard streams of the to-be-launched program, and default to C<"-">, which
 means they inherit the stream from the parent process. Setting one (or more)
 of them to C<True> makes the stream available as an L<IO::Pipe> object of the
 same name, so for example C<$proc.out>. Or you can pass an existing
-L<IO::Handle> objet (for example IO::Pipe) in, in which case this handle is
+L<IO::Handle> object (for example IO::Pipe) in, in which case this handle is
 used for the stream.
 
 C<$bin> controls whether the streams are handled as binary (i.e.