Fix some typo issue

[kousha1999]

What's the issue?

Testing for Incubated Vulnerability (Line 80)
Remove Spaces Between back door
✖️ back door
✔️ backdoor

Testing for Cross Site Flashing (Line 156, 157)
Remove Spaces Between load and ()
✖️ XML.load ( 'url' ), LoadVars.load ( 'url' )
✔️ XML.load( 'url' ), LoadVars.load( 'url' )

Fingerprint Web Application Framework (Line 58, 78)
Replace HTTP-request with HTTP request
✖️ HTTP-request, HTTP-headers
✔️ HTTP request, HTTP headers

I'll PR to fix this issue. Is it ok? Any idea or Comment?

• Assign me, please!