Fix typos.

README

@@ -194,7 +194,7 @@ The definition for the group called *groupname* is in the file
 `groups/groupname.json`; it does not contain the group name, which makes
 it easy to copy or link group definitions.  You may use subdirectories:
 a file `groups/teaching/networking.json` defines a group called
-*teching/networking*.
+*teaching/networking*.
 
 Every group definition file contains a JSON directory.  All fields are
 optional, but unless you specify at least one user definition (`op`,

README.PROTOCOL

@@ -146,6 +146,7 @@ streams to a list containing either 'audio', or one of 'video' or
         '': ['audio', 'video']
     }
 }
+```
 
 ## Pushing streams
 
@@ -159,11 +160,11 @@ A stream is created by the sender with the `offer` message:
     replace: id,
     source: source-id,
     username: username,
-    sdp: sdp,
+    sdp: sdp
 }
 ```
 
-If a stream with the same id exists, then this is a renegotation;
+If a stream with the same id exists, then this is a renegotiation;
 otherwise this message creates a new stream.  If the field `replace` is
 not empty, then this request additionally requests that an existing stream
 with the given id should be closed, and the new stream should replace it;
@@ -217,7 +218,7 @@ At any time after answering, the client may change the set of streams
 being offered by sending a 'requestStream' request:
 ```javascript
 {
-    type: 'answerStream'
+    type: 'requestStream'
     id: id,
     request: [audio, video]
 }

group/group_test.go

@@ -55,7 +55,7 @@ func TestGroup(t *testing.T) {
 	}
 
 	if public := GetPublic(); len(public) != 1 || public[0].Name != "group/subgroup" {
-		t.Errorf("Expeced group/subgroup, got %v", public)
+		t.Errorf("Expected group/subgroup, got %v", public)
 	}
 
 	Expire()