Auto-generated commit

Author: stdlib-bot

.github/.keepalive

@@ -24,6 +24,7 @@ var setReadOnly = require( '@stdlib/utils-define-nonenumerable-read-only-propert
 var iteratorSymbol = require( '@stdlib/symbol-iterator' );
 var abs = require( '@stdlib/math-base-special-abs' );
 var cospi = require( '@stdlib/math-base-special-cospi' );
+var format = require( '@stdlib/string-format' );
 var validate = require( './validate.js' );
 
 
@@ -111,10 +112,10 @@ function iterBartlettHannPulse( options ) {
 		opts.duration = opts.period;
 	}
 	if ( opts.duration > opts.period ) {
-		throw new RangeError( 'invalid option. `duration` option must be less than or equal to the period. Option: `' + opts.duration + '`.' );
+		throw new RangeError( format( 'invalid option. `%s` option must be less than or equal to the period. Option: `%u`.', 'duration', opts.duration ) );
 	}
 	if ( opts.duration <= 2 ) {
-		throw new RangeError( 'invalid option. `duration` option must be greater than 2. Option: `' + opts.duration + '`.' );
+		throw new RangeError( format( 'invalid option. `%s` option must be greater than 2. Option: `%s`.' , 'duration', opts.duration ) );
 	}
 	t = ( opts.period-opts.offset ) % opts.period;
 	if ( t < 0 ) {