fixes

Author: swissspidy

features/shell.feature

@@ -51,7 +51,7 @@ Feature: WordPress REPL
       return true;
       """
 
-    When I try `WP_CLI_CUSTOM_SHELL=/nonsense/path wp shell --basic < session`
+    When I try `MSYS_NO_PATHCONV=1 WP_CLI_CUSTOM_SHELL=/nonsense/path wp shell --basic < session`
     Then STDOUT should be empty
     And STDERR should contain:
       """

src/WP_CLI/Shell/REPL.php

@@ -144,7 +144,7 @@ private function prompt() {
 			// @phpstan-ignore booleanNot.alwaysTrue
 			$prompt = ( ! $done && false !== $full_line ) ? '--> ' : $this->prompt;
 
-			if ( ! self::is_tty() ) {
+			if ( \WP_CLI\Utils\is_windows() && ! self::is_tty() ) {
 				if ( getenv( 'WP_CLI_CUSTOM_SHELL' ) ) {
 					self::create_prompt_cmd( $prompt, $this->history_file );
 				}