docs: fix missing examples and fix spacing

lib/node_modules/@stdlib/math/base/special/acsc/benchmark/benchmark.native.js

@@ -33,7 +33,7 @@ var pkg = require( './../package.json' ).name;
 
 var acsc = tryRequire( resolve( __dirname, './../lib/native.js' ) );
 var opts = {
-	'skip': (acsc instanceof Error)
+	'skip': ( acsc instanceof Error )
 };
 
 

lib/node_modules/@stdlib/math/base/special/erfcx/test/test.native.js

@@ -41,7 +41,7 @@ var tiny = require( './fixtures/tiny.json' );
 // VARIABLES //
 
 var INV_SQRT_PI = 0.56418958354775628694807945156; // 1 / sqrt(pi)
-var erfcx = tryRequire( resolve(__dirname, './../lib/native.js' ) );
+var erfcx = tryRequire( resolve( __dirname, './../lib/native.js' ) );
 var opts = {
 	'skip': ( erfcx instanceof Error )
 };

lib/node_modules/@stdlib/math/base/special/erfinvf/lib/native.js

@@ -31,6 +31,34 @@ var addon = require( './../src/addon.node' );
 * @private
 * @param {number} x - input value
 * @returns {number} function value
+*
+* @example
+* var y = erfinvf( 0.5 );
+* // returns ~0.4769
+*
+* @example
+* var y = erfinvf( 0.8 );
+* // returns ~0.9062
+*
+* @example
+* var y = erfinvf( 0.0 );
+* // returns 0.0
+*
+* @example
+* var y = erfinvf( -0.0 );
+* // returns -0.0
+*
+* @example
+* var y = erfinvf( -1.0 );
+* // returns -Infinity
+*
+* @example
+* var y = erfinvf( 1.0 );
+* // returns Infinity
+*
+* @example
+* var y = erfinvf( NaN );
+* // returns NaN
 */
 function erfinvf( x ) {
 	return addon( x );