doc: various typos, remove apostrophes from ordinals
R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/5845059
diff --git a/doc/gccgo_install.html b/doc/gccgo_install.html
index ae35943..e769c22 100644
--- a/doc/gccgo_install.html
+++ b/doc/gccgo_install.html
@@ -342,7 +342,7 @@
</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):
