doc/go1.4.html: breaking compiler change, no plugins in misc

LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/166850043

doc/go1.4.html

@@ -9,6 +9,7 @@
 <p>
 The latest Go release, version 1.4, arrives as scheduled six months after 1.3
 and contains only one tiny language change,
+a possibly breaking change to the compiler,
 a backwards-compatible simple form of <code>for</code>-<code>range</code> loop.
 The release focuses primarily on implementation work, improving the garbage collector
 and preparing the ground for a fully concurrent collector to be rolled out in the
@@ -80,6 +81,39 @@ this new form as the
 may now be <code>nil</code>.
 </p>
 
+<h3 id="methodonpointertopointer">Method calls on **T</h3>
+
+<p>
+Given these declarations,
+</p>
+
+<pre>
+type T int
+func (T) M() {}
+var x **T
+</pre>
+
+<p>
+both <code>gc</code> and <code>gccgo</code> accepted the method call
+</p>
+
+<pre>
+x.M()
+</pre>
+
+<p>
+which is a double dereference of the pointer-to-pointer <code>x</code>.
+The Go specification allows a single dereference to be inserted automatically,
+but not two, so this call is erroneous according to the language definition.
+It has therefore been disallowed in Go 1.4, which is a breaking change,
+although very few programs will be affected.
+</p>
+
+<p>
+<em>Updating</em>: Code that depends on the old, erroneous behavior will no longer
+compile but is easy to fix by adding an explicit dereference.
+</p>
+
 <h2 id="os">Changes to the supported operating systems and architectures</h2>
 
 <h3 id="android">Android</h3>
@@ -408,8 +442,20 @@ have been updated.
 <h3 id="misc">Miscellany</h3>
 
 <p>
-TODO misc news
-misc: deleted editor support; refer to https://code.google.com/p/go-wiki/wiki/IDEsAndTextEditorPlugins instead (CL 105470043)
+The standard repository's top-level <code>misc</code> directory used to contain
+Go support for editors and IDEs: plugins, initialization scripts and so on.
+Maintaining these was becoming time-consuming
+and needed external help because many of the editors listed were not used by
+members of the core team.
+It also required us to make decisions about which plugin was best for a given
+editor, even for editors we do not use.
+</p>
+
+<p>
+The Go community at large is much better suited to managing this information.
+In Go 1.4, therefore, this support has been removed from the repository.
+Instead, there is a curated, informative list of what's available on
+a <a href="https://code.google.com/p/go-wiki/wiki/IDEsAndTextEditorPlugins">wiki page</a>.
 </p>
 
 <h2 id="performance">Performance</h2>
@@ -445,7 +491,7 @@ Library changes that affect performance are documented below.
 <h3 id="new_packages">New packages</h3>
 
 <p>
-TODO new packages
+There are no new packages in this release.
 </p>
 
 <h3 id="major_library_changes">Major changes to the library</h3>
@@ -456,7 +502,7 @@ TODO major changes
 
 <pre>
 encoding/gob: remove unsafe (CL 102680045)
-syscall: now frozen (CL 129820043)
+syscall: now frozen (CL 129820043); go.sys subrepo created: http://golang.org/s/go1.4-syscall
 </pre>
 
 <h3 id="minor_library_changes">Minor changes to the library</h3>
@@ -502,6 +548,4 @@ testing: add TestMain support (CL 148770043)
 text/scanner: add IsIdentRune field of Scanner. (CL 108030044)
 text/template: allow comparison of signed and unsigned integers (CL 149780043)
 time: use the micro symbol (µ (U+00B5)) to print microsecond duration (CL 105030046)
-
-go.sys subrepo created: http://golang.org/s/go1.4-syscall
 </pre>