Comment changes (#77)

* comment typos

* error comment: another approach

I wasn't able to parse the error comment. Could just be me.

imports.md

@@ -84,7 +84,7 @@ wasi-clocks API to the list.</p>
 <p>This function does not return a <code>result</code>; polling in itself does not
 do any I/O so it doesn't fail. If any of the I/O sources identified by
 the pollables has an error, it is indicated by marking the source as
-being reaedy for I/O.</p>
+being ready for I/O.</p>
 <h5>Params</h5>
 <ul>
 <li><a name="poll.in"><code>in</code></a>: list&lt;borrow&lt;<a href="#pollable"><a href="#pollable"><code>pollable</code></a></a>&gt;&gt;</li>

wit/error.wit

@@ -11,13 +11,11 @@ interface error {
     /// `wasi:io/streams/stream-error` type.
     ///
     /// To provide more specific error information, other interfaces may
-    /// provide functions to further "downcast" this error into more specific
-    /// error information. For example, `error`s returned in streams derived
-    /// from filesystem types to be described using the filesystem's own
-    /// error-code type, using the function
-    /// `wasi:filesystem/types/filesystem-error-code`, which takes a parameter
-    /// `borrow<error>` and returns
-    /// `option<wasi:filesystem/types/error-code>`.
+    /// offer functions to "downcast" this error into more specific types. For example,
+    /// errors returned from streams derived from filesystem types can be described using
+    /// the filesystem's own error-code type. This is done using the function
+    /// `wasi:filesystem/types/filesystem-error-code`, which takes a `borrow<error>`
+    /// parameter and returns an `option<wasi:filesystem/types/error-code>`.
     ///
     /// The set of functions which can "downcast" an `error` into a more
     /// concrete type is open.

wit/poll.wit

@@ -36,6 +36,6 @@ interface poll {
     /// This function does not return a `result`; polling in itself does not
     /// do any I/O so it doesn't fail. If any of the I/O sources identified by
     /// the pollables has an error, it is indicated by marking the source as
-    /// being reaedy for I/O.
+    /// being ready for I/O.
     poll: func(in: list<borrow<pollable>>) -> list<u32>;
 }