old_contents: 'use strict';
  
  // MODULES //
  
  var tape = require( 'tape' );
  var isInfinite = require( '@stdlib/math/base/utils/is-infinite' );
  var isnan = require( '@stdlib/utils/is-nan' );
  var PINF = require( '@stdlib/math/constants/float64-pinf' );
  var EPS = require( '@stdlib/math/constants/float64-eps' );
  var abs = require( '@stdlib/math/base/special/abs' );
  var betaln = require( './../lib' );
  
  
  // FIXTURES //
  
  var arg1 = require( './fixtures/r/arg1.json' );
  var arg2 = require( './fixtures/r/arg2.json' );
  var expected = require( './fixtures/r/expected.json' );
  var i;
  var v;
  for ( i = 0; i < expected.length; i++ ) {
  	v = expected[ i ];
  	if ( v === 'Inf' ) {
  		expected[ i ] = Number.POSITIVE_INFINITY;
  	}
  	else if ( v === 'NaN' ) {
  		expected[ i ] = NaN;
  	}
  }
  
  
  // TESTS //
  
  tape( 'main export is a function', function test( t ) {
  	t.ok( true, __filename );
  	t.ok( typeof betaln === 'function', 'main export is a function' );
  	t.end();
  });
  
  tape( 'the function returns `NaN` if provided a `NaN`', function test( t ) {
  	var val = betaln( NaN, 2.0 );
  	t.ok( isnan( val ), 'returns NaN' );
  	val = betaln( 2.0, NaN );
  	t.ok( isnan( val ), 'returns NaN' );
  	t.end();
  });
  
  tape( 'the function returns `NaN` if provided negative values', function test( t ) {
  	var val = betaln( -2.0, 5.0 );
  	t.ok( isnan( val ), 'returns NaN' );
  	val = betaln( 4.0, -3.0 );
  	t.ok( isnan( val ), 'returns NaN' );
  	t.end();
  });
  
  tape( 'the function returns +Infinity if at least one argument is zero', function test( t ) {
  	var val = betaln( 0.0, 2.0 );
  	t.equal( val, PINF, 'returns +Infinity' );
  	val = betaln( 1.0, 0.0 );
  	t.equal( val, PINF, 'returns +Infinity' );
  	t.end();
  });
  
  tape( 'the function evaluates the natural logarithm of the beta function', function test( t ) {
  	var actual;
  	var delta;
  	var tol;
  	var b1;
  	var b2;
  	var i;
  	for ( i = 0; i < arg1.length; i++ ) {
  		actual =  betaln( arg1[ i ], arg2[ i ] );
  		b1 = isInfinite( actual );
  		b2 = isInfinite( expected[ i ] );
  		t.equal( b1, b2, 'returned result is ' + ( (b2) ? 'not finite' : 'finite' ) );
  
  		b1 = isnan( actual );
  		b2 = isnan( expected[ i ] );
  		t.equal( b1, b2, 'returned result is ' + ( (b1) ? '' : 'not' ) + ' NaN' );
  		if ( !b1 ) {
  			delta = abs( actual - expected[ i ] );
  			tol = 2.0 * EPS * abs( expected[ i ] );
  			t.equal( delta <= tol, true, 'returned result is within tolerance. actual: ' + actual + '; expected: ' + expected[ i ] + '.' );
  		}
  	}
  	t.end();
  });
  
new_contents: 'use strict';
  
  // MODULES //
  
  var tape = require( 'tape' );
  var isInfinite = require( '@stdlib/math/base/utils/is-infinite' );
  var isnan = require( '@stdlib/utils/is-nan' );
  var PINF = require( '@stdlib/math/constants/float64-pinf' );
  var EPS = require( '@stdlib/math/constants/float64-eps' );
  var abs = require( '@stdlib/math/base/special/abs' );
  var betaln = require( './../lib' );
  
  
  // FIXTURES //
  
  var arg1 = require( './fixtures/r/arg1.json' );
  var arg2 = require( './fixtures/r/arg2.json' );
  var expected = require( './fixtures/r/expected.json' );
  var i;
  var v;
  for ( i = 0; i < expected.length; i++ ) {
  	v = expected[ i ];
  	if ( v === 'Inf' ) {
  		expected[ i ] = Number.POSITIVE_INFINITY;
  	}
  	else if ( v === 'NaN' ) {
  		expected[ i ] = NaN;
  	}
  }
  
  
  // TESTS //
  
  tape( 'main export is a function', function test( t ) {
  	t.ok( true, __filename );
  	t.ok( typeof betaln === 'function', 'main export is a function' );
  	t.end();
  });
  
  tape( 'the function returns `NaN` if provided a `NaN`', function test( t ) {
  	var val = betaln( NaN, 2.0 );
  	t.ok( isnan( val ), 'returns NaN' );
  	val = betaln( 2.0, NaN );
  	t.ok( isnan( val ), 'returns NaN' );
  	t.end();
  });
  
  tape( 'the function returns `NaN` if provided negative values', function test( t ) {
  	var val = betaln( -2.0, 5.0 );
  	t.ok( isnan( val ), 'returns NaN' );
  	val = betaln( 4.0, -3.0 );
  	t.ok( isnan( val ), 'returns NaN' );
  	t.end();
  });
  
  tape( 'the function returns +Infinity if at least one argument is zero', function test( t ) {
  	var val = betaln( 0.0, 2.0 );
  	t.equal( val, PINF, 'returns +Infinity' );
  	val = betaln( 1.0, 0.0 );
  	t.equal( val, PINF, 'returns +Infinity' );
  	t.end();
  });
  
  tape( 'the function evaluates the natural logarithm of the beta function', function test( t ) {
  	var actual;
  	var delta;
  	var tol;
  	var b1;
  	var b2;
  	var i;
  	for ( i = 0; i < arg1.length; i++ ) {
  		actual = betaln( arg1[ i ], arg2[ i ] );
  		b1 = isInfinite( actual );
  		b2 = isInfinite( expected[ i ] );
  		t.equal( b1, b2, 'returned result is ' + ( (b2) ? 'not finite' : 'finite' ) );
  
  		b1 = isnan( actual );
  		b2 = isnan( expected[ i ] );
  		t.equal( b1, b2, 'returned result is ' + ( (b1) ? '' : 'not' ) + ' NaN' );
  		if ( !b1 ) {
  			delta = abs( actual - expected[ i ] );
  			tol = 2.0 * EPS * abs( expected[ i ] );
  			t.equal( delta <= tol, true, 'returned result is within tolerance. actual: ' + actual + '; expected: ' + expected[ i ] + '.' );
  		}
  	}
  	t.end();
  });
  
subject: Remove extra space