doc: various typos, remove apostrophes from ordinals

R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/5845059

Author: jnjackins

doc/code.html

@@ -245,7 +245,7 @@ <h3>Building a package</h3>
 </pre>
 
 <p>
-The resulting workspace directory tree (assuimg we're running Linux on a 64-bit
+The resulting workspace directory tree (assuming we're running Linux on a 64-bit
 system) looks like this:
 </p>
 

doc/debugging_with_gdb.html

@@ -351,7 +351,7 @@ <h3 id="Inspecting_the_stack">Inspecting the stack</h3>
 </pre>
 
 <p>
-That <code>struct hchan<*testing.T></code> is the runtime-internal represntation of a channel.  It is currently empty, or gdb would have pretty-printed it's contents.
+That <code>struct hchan<*testing.T></code> is the runtime-internal representation of a channel.  It is currently empty, or gdb would have pretty-printed it's contents.
 </p>
 
 <p>

doc/gccgo_install.html

@@ -342,7 +342,7 @@ <h3 id="Function_names">Function names</h3>
 </pre>
 
 <p>
-The C function naturally expects a nul terminated string, which in
+The C function naturally expects a NUL-terminated string, which in
 Go is equivalent to a pointer to an array (not a slice!) of
 <code>byte</code> with a terminating zero byte. So a sample call
 from Go would look like (after importing the <code>os</code> package):

doc/go_mem.html

@@ -283,7 +283,7 @@ <h3>Locks</h3>
 
 <p class="rule">
 For any <code>sync.Mutex</code> or <code>sync.RWMutex</code> variable <code>l</code> and <i>n</i> &lt; <i>m</i>,
-the <i>n</i>'th call to <code>l.Unlock()</code> happens before the <i>m</i>'th call to <code>l.Lock()</code> returns.
+call <i>n</i> of <code>l.Unlock()</code> happens before call <i>m</i> of <code>l.Lock()</code> returns.
 </p>
 
 <p>
@@ -316,9 +316,9 @@ <h3>Locks</h3>
 
 <p class="rule">
 For any call to <code>l.RLock</code> on a <code>sync.RWMutex</code> variable <code>l</code>,
-there is an <i>n</i> such that the <code>l.RLock</code> happens (returns) after the <i>n</i>'th call to
+there is an <i>n</i> such that the <code>l.RLock</code> happens (returns) after call <i>n</i> to
 <code>l.Unlock</code> and the matching <code>l.RUnlock</code> happens
-before the <i>n</i>+1'th call to <code>l.Lock</code>.
+before call <i>n</i>+1 to <code>l.Lock</code>.
 </p>
 
 <h3>Once</h3>

doc/go_spec.html

@@ -75,7 +75,7 @@ <h2 id="Notation">Notation</h2>
 <p>
 The form <code>a … b</code> represents the set of characters from
 <code>a</code> through <code>b</code> as alternatives. The horizontal
-ellipis <code>…</code> is also used elsewhere in the spec to informally denote various
+ellipsis <code>…</code> is also used elsewhere in the spec to informally denote various
 enumerations or code snippets that are not further specified. The character <code>…</code>
 (as opposed to the three characters <code>...</code>) is not a token of the Go
 language.