PERL-812 Fix typos in README and GSSAPI section

CONTRIBUTING.md

@@ -40,7 +40,7 @@ ticket in our issue management tool, JIRA:
    account](https://jira.mongodb.org/secure/Signup!default.jspa) if you
    don't already have one.
  - Navigate to the [JIRA PERL
-   project](https://jira.mongodb.org/browse/PERL>)
+   project](https://jira.mongodb.org/browse/PERL)
  - Click the **Create** button - Please provide as much information as
    possible for a bug and how to reproduce it.
 
@@ -128,4 +128,3 @@ To build and test (after configuration):
 
     $ make
     $ make test
-

lib/MongoDB/MongoClient.pm

@@ -2024,7 +2024,7 @@ that the '@' in the principal name must be encoded as "%40":
 
     my $mc = MongoDB::MongoClient->new(
         host =>
-          'mongodb://johndoe%40EXAMPLE.COM@mongo.examplecom/?authMechanism=GSSAPI',
+          'mongodb://johndoe%40EXAMPLE.COM@mongo.example.com/?authMechanism=GSSAPI',
     );
 
 The default service name is 'mongodb'.  It can be changed with the
@@ -2040,4 +2040,3 @@ You B<MUST> call the L</reconnect> method on any MongoDB::MongoClient objects
 after forking or spawning a thread.
 
 =cut
-