[install-guide] exepected is not a words

[Pete Travis]

commit 3484b94f242b00eed73dc91b6f57c1a7541af83b
Author: Pete Travis <immanetize at fedoraproject.org>
Date:   Wed Dec 24 13:16:35 2014 -0700

    exepected is not a words

 en-US/Preparing_for_Installation.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/en-US/Preparing_for_Installation.xml b/en-US/Preparing_for_Installation.xml
index 1d7c372..0c3325b 100644
--- a/en-US/Preparing_for_Installation.xml
+++ b/en-US/Preparing_for_Installation.xml
@@ -99,7 +99,7 @@ Mode                LastWriteTime         Length  Name
 <command><prompt>&gt;</prompt> $image = "Fedora-Server-DVD-x86_64-21.iso"</command>
 <command><prompt>&gt;</prompt> $checksum_file = "Fedora-Server-21-x86_64-CHECKSUM"</command>
 <command><prompt>&gt;</prompt> $sha256 = New-Object -TypeName System.Security.Cryptography.sha256CryptoServiceProvider</command>
-<command><prompt>&gt;</prompt> $exepected_checksum = ((Get-Content $checksum_file | Select-String -Pattern $image) -split " ")[0]</command>
+<command><prompt>&gt;</prompt> $expected_checksum = ((Get-Content $checksum_file | Select-String -Pattern $image) -split " ")[0]</command>
             </screen>
           </step>
           <step>