doc: fix typos

Change-Id: I46046cddceff2d44a7b2517db1ebf7acdf5f2b90
GitHub-Last-Rev: 7fb9f26476d2764f07d068ce612bf79b1e7f44b4
GitHub-Pull-Request: golang/go#30144
Reviewed-on: https://go-review.googlesource.com/c/161718Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

doc/debugging_with_gdb.html

@@ -256,7 +256,7 @@ Use the <code>"l"</code> or <code>"list"</code> command to inspect source code.
 </pre>
 
 <p>
-List a specific part of the source parametrizing <code>"list"</code> with a
+List a specific part of the source parameterizing <code>"list"</code> with a
 function name (it must be qualified with its package name).
 </p>
 

doc/go1.3.html

@@ -525,7 +525,7 @@ client.
 The <a href="/pkg/net/http/"><code>net/http</code></a> package's
 <a href="/pkg/net/http/#Request.ParseMultipartForm"><code>Request.ParseMultipartForm</code></a>
 method will now return an error if the body's <code>Content-Type</code>
-is not <code>mutipart/form-data</code>.
+is not <code>multipart/form-data</code>.
 Prior to Go 1.3 it would silently fail and return <code>nil</code>.
 Code that relies on the previous behavior should be updated.
 </li>