fix: wrong completion previews displayed for fuzzy completion

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

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

@@ -26,6 +26,7 @@ var readline = require( 'readline' );
 var logger = require( 'debug' );
 var setNonEnumerableReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
 var repeat = require( '@stdlib/string/repeat' );
+var startsWith = require( '@stdlib/string/starts-with' );
 var commonPrefix = require( './longest_common_prefix.js' );
 
 
@@ -114,6 +115,11 @@ setNonEnumerableReadOnly( PreviewCompleter.prototype, '_completionCallback', fun
 			debug( 'Unable to display a completion preview. Completion candidates have no common prefix.' );
 			return;
 		}
+		// If the input is not an exact prefix of the completion candidate's common prefix, no completion preview to display, as the common prefix is a fuzzy match (not exact) to the input string hence cannot contruct by simple concatenation...
+		if ( !startsWith( prefix, completions[1] ) ) {
+			debug( 'Unable to display a completion preview. Common prefix is a fuzzy match to the input' );
+			return;
+		}
 		// Extract the completion preview substring (e.g., if the current line is 'ba', preview should be 'ck'):
 		self._preview = prefix.substring( commonPrefix( prefix, completions[ 1 ] ).length ); // eslint-disable-line max-len