Removed the unnecessary backslash in !DOCTYPE html.

[aryanmehra0]

Added a comma between the Swift and Smooth options in the flip range. Removed the unnecessary   between Swift and , in the flip range. Added a comma between the Ortographic and Perspective options in the fov range. Removed the unnecessary   between Ortographic and , in the fov range. Added a comma between the Cube

[aryanmehra0]

@dev_tanay plz assign this particular issue #138 and give the level for my point in GSSOC

[Dev-tanay]

Please mention the issue number @aryanmehra0

[aryanmehra0]

@Dev-tanay #138