typo and whitespace correction

css/print/paper.css

@@ -49,7 +49,7 @@ body, p, td, li, div, a {
 }
 
 /* SECTION 4: Set heading font face, sizes, and color.
-   Diffrentiate your headings from your body text.
+   Differentiate your headings from your body text.
    Perhaps use a large sans-serif for distinction. */
 h1,h2,h3,h4,h5,h6 {
 	color: #000!important;

css/print/pdf.css

@@ -56,7 +56,7 @@ body, p, td, li, div {
 }
 
 /* SECTION 4: Set heading font face, sizes, and color.
-   Diffrentiate your headings from your body text.
+   Differentiate your headings from your body text.
    Perhaps use a large sans-serif for distinction. */
 h1,h2,h3,h4,h5,h6 {
 	text-shadow: 0 0 0 #000 !important;

js/reveal.js

@@ -1526,7 +1526,7 @@ var Reveal = (function(){
 				state = state.concat( slideState.split( ' ' ) );
 			}
 
-			// If this slide has a data-autoslide attribtue associated use this as
+			// If this slide has a data-autoslide attribute associated use this as
 			// autoSlide value otherwise use the global configured time
 			var slideAutoSlide = slides[index].getAttribute( 'data-autoslide' );
 			if( slideAutoSlide ) {
@@ -2119,7 +2119,7 @@ var Reveal = (function(){
 
 					var value = config.keyboard[ key ];
 
-					// Calback function
+					// Callback function
 					if( typeof value === 'function' ) {
 						value.apply( null, [ event ] );
 					}