Twenty Seventeen: supportsInlineSVG is unnecessarily called twice

[tywayne]

In /assets/js/global.js we set a class based on SVG support using supportsInlineSVG like so:

supportsInlineSVG();
if ( true === supportsInlineSVG() ) {
	document.documentElement.className = document.documentElement.className.replace( /(\s*)no-svg(\s*)/, '$1svg$2' );
}

There is no need to call supportsInlineSVG, and then immediately call it again in the logic check.

[davidakennedy]

In 39081:

Twenty Seventeen: Fix supportsInlineSVG() being unnecessarily called twice

• Also, fix spacing inconsistency in comment.

Props tywayne.

Fixes #38556.