fix: avoid paging if viewport height too low

Signed-off-by: Snehil Shah <snehilshah.989@gmail.com>

lib/node_modules/@stdlib/repl/lib/output_stream.js

@@ -40,10 +40,10 @@ var displayPrompt = require( './display_prompt.js' );
 var debug = logger( 'repl:output_stream' );
 
 // Define the minimum viewport height necessary to support paging:
-var MIN_VIEWPORT_HEIGHT = 4; // number of rows
+var MIN_VIEWPORT_HEIGHT = 6; // number of rows
 
-// Define the number of rows which are reserved for displaying the paging UI:
-var RESERVED_PAGING_ROWS = 3;
+// Define the number of rows which are reserved for displaying the paging UI including the input prompt:
+var RESERVED_PAGING_ROWS = 4;
 
 
 // FUNCTIONS //
@@ -265,7 +265,7 @@ setNonEnumerableReadOnly( OutputStream.prototype, '_resetCursor', function reset
 * @returns {integer} pager height
 */
 setNonEnumerableReadOnly( OutputStream.prototype, '_pagerHeight', function pagerHeight() {
-	var height = max( this._repl.viewportHeight()-1, MIN_VIEWPORT_HEIGHT );
+	var height = max( this._repl.viewportHeight(), MIN_VIEWPORT_HEIGHT );
 	return height - RESERVED_PAGING_ROWS;
 });
 
@@ -280,7 +280,9 @@ setNonEnumerableReadOnly( OutputStream.prototype, '_pagerHeight', function pager
 * @returns {boolean} boolean indicating whether content is "scrollable"
 */
 setNonEnumerableReadOnly( OutputStream.prototype, '_isScrollable', function isScrollable( N ) {
-	return ( N > this._pagerHeight() );
+	var viewportHeight = this._repl.viewportHeight();
+	var pagerHeight = this._pagerHeight();
+	return ( N > pagerHeight && viewportHeight >= MIN_VIEWPORT_HEIGHT );
 });
 
 /**