[powershell-experimental] ValidatePattern with double-quote (") throws-exception (#5956)

* ValidatePattern having double quote(") throws exception on running Build.ps1

* fix tab with space

Co-authored-by: Ghufran Zahidi <gzahidi@cisco.com>

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellExperimentalClientCodegen.java

@@ -19,6 +19,7 @@ package org.openapitools.codegen.languages;
 import io.swagger.v3.oas.models.media.ArraySchema;
 import io.swagger.v3.oas.models.media.Schema;
 import org.apache.commons.io.FilenameUtils;
+import org.apache.commons.lang3.StringEscapeUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.*;
 import org.openapitools.codegen.meta.GeneratorMetadata;
@@ -622,6 +623,28 @@ public class PowerShellExperimentalClientCodegen extends DefaultCodegen implemen
         supportingFiles.add(new SupportingFile("appveyor.mustache", "", "appveyor.yml"));
     }
 
+    @SuppressWarnings("static-method")
+    @Override
+    public String escapeText(String input) {
+    
+        if (input == null) {
+            return input;
+        }
+
+        // remove \t, \n, \r
+        // replace \ with \\
+        // replace " with \"
+        // outter unescape to retain the original multi-byte characters
+        // finally escalate characters avoiding code injection
+        return escapeUnsafeCharacters(
+                StringEscapeUtils.unescapeJava(
+                        StringEscapeUtils.escapeJava(input)
+                                .replace("\\/", "/"))
+                        .replaceAll("[\\t\\n\\r]", " ")
+                        .replace("\\", "\\\\")
+                        .replace("\"", "\"\""));
+    }
+    
     @Override
     public String escapeUnsafeCharacters(String input) {
         return input.replace("#>", "#_>").replace("<#", "<_#");

modules/openapi-generator/src/test/resources/3_0/powershell/petstore.yaml

@@ -689,6 +689,7 @@ components:
           type: string
         password:
           type: string
+          pattern: '["A-Z]+-[0-9][0-9]'
         phone:
           type: string
         userStatus:

samples/client/petstore/powershell-experimental/src/PSPetstore/Model/User.ps1

@@ -62,6 +62,7 @@ function Initialize-PSUser {
         [String]
         ${Email},
         [Parameter(Position = 5, ValueFromPipelineByPropertyName = $true)]
+        [ValidatePattern("[""A-Z]+-[0-9][0-9]")]
         [String]
         ${Password},
         [Parameter(Position = 6, ValueFromPipelineByPropertyName = $true)]