exec: fix missing documentation warnings

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>

diff --git a/lib/standard/exec.nit b/lib/standard/exec.nit
index 150ed48..1ee3095 100644 (file)
--- a/lib/standard/exec.nit
+++ b/lib/standard/exec.nit
@@ -92,6 +92,8 @@ end
 class IProcess
        super Process
        super IStream
+
+       # File Descriptor used for the input.
        var stream_in: FDIStream is noinit
 
        redef fun close do stream_in.close
@@ -113,6 +115,8 @@ end
 class OProcess
        super Process
        super OStream
+
+       # File Descriptor used for the output.
        var stream_out: OStream is noinit
 
        redef fun close do stream_out.close
@@ -159,6 +163,9 @@ redef class Sys
 end
 
 redef class NativeString
+       # Execute self as a shell command.
+       #
+       # See the posix function system(3).
        fun system: Int is extern "string_NativeString_NativeString_system_0"
 end