X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=docs%2Fusers_guide%2Fghci.xml;h=7a3c77a74d2ce556e15e9829cf31b01130911593;hb=b0d80aa3d908a6b9991920a5ac7fd1b437ecafd3;hp=c0167bfe09d924eb726d3183a3afe14b954854b2;hpb=66518f5de0f2f5076f06f2e037411985d96809e0;p=ghc-hetmet.git

diff --git a/docs/users_guide/ghci.xml b/docs/users_guide/ghci.xml
index c0167bf..7a3c77a 100644
--- a/docs/users_guide/ghci.xml
+++ b/docs/users_guide/ghci.xml
@@ -1923,6 +1923,12 @@ Prelude> :. cmds.ghci
 	  will be printed.  If <replaceable>name</replaceable> has
 	  been loaded from a source file, then GHCi will also display
 	  the location of its definition in the source.</para>
+	  <para>For types and classes, GHCi also summarises instances that
+	  mention them.  To avoid showing irrelevant information, an instance
+	  is shown only if (a) its head mentions <relaceable>name</replaceable>, 
+	  and (b) all the other things mentioned in the instance
+	  are in scope (either qualified or otherwise) as a result of 
+	  a <literal>:load</literal> or <literal>:module</literal> commands. </para>
 	</listitem>
       </varlistentry>
 
@@ -2587,6 +2593,18 @@ Prelude> :set -fno-glasgow-exts
           <para>See <xref linkend="ghci-windows"/>.</para>
         </listitem>
       </varlistentry>
+
+      <varlistentry>
+	<term>The default buffering mode is different in GHCi to GHC.</term>
+        <listitem>
+          <para>
+            In GHC, the stdout handle is line-buffered by default.
+            However, in GHCi we turn off the buffering on stdout,
+            because this is normally what you want in an interpreter:
+            output appears as it is generated.
+          </para>
+        </listitem>
+      </varlistentry>
     </variablelist>
   </sect1>