Backquote/backtick symbol (`) is not escaped correctly

Author: raman-savitski-exadel

src/openApi/v2/parser/escapeDescription.spec.ts

@@ -2,8 +2,12 @@ import { escapeDescription } from './escapeDescription';
 
 describe('escapeDescription', () => {
     it('should escape', () => {
+        expect(escapeDescription('foo `test` bar')).toEqual('foo \\`test\\` bar');
+    });
+
+    it('should not escape', () => {
         expect(escapeDescription('')).toEqual('');
         expect(escapeDescription('fooBar')).toEqual('fooBar');
-        expect(escapeDescription('foo `test` bar')).toEqual('foo \\`test\\` bar');
+        expect(escapeDescription('foo \\`test\\` bar')).toEqual('foo \\`test\\` bar');
     });
 });

src/openApi/v2/parser/escapeDescription.ts

@@ -1,3 +1,3 @@
 export function escapeDescription(value: string): string {
-    return value.replace(/`/g, '\\`');
+    return value.replace(/([^\\])`/g, '$1\\`');
 }

src/openApi/v3/parser/escapeDescription.spec.ts

@@ -2,8 +2,12 @@ import { escapeDescription } from './escapeDescription';
 
 describe('escapeDescription', () => {
     it('should escape', () => {
+        expect(escapeDescription('foo `test` bar')).toEqual('foo \\`test\\` bar');
+    });
+
+    it('should not escape', () => {
         expect(escapeDescription('')).toEqual('');
         expect(escapeDescription('fooBar')).toEqual('fooBar');
-        expect(escapeDescription('foo `test` bar')).toEqual('foo \\`test\\` bar');
+        expect(escapeDescription('foo \\`test\\` bar')).toEqual('foo \\`test\\` bar');
     });
 });

src/openApi/v3/parser/escapeDescription.ts

@@ -1,3 +1,3 @@
 export function escapeDescription(value: string): string {
-    return value.replace(/`/g, '\\`');
+    return value.replace(/([^\\])`/g, '$1\\`');
 }