Fixed string escaping in AstPrinter

mesonbuild/ast/printer.py

@@ -72,9 +72,13 @@ class AstPrinter(AstVisitor):
         self.append(str(node.value), node)
         node.lineno = self.curr_line or node.lineno
 
+    def escape(self, val: str) -> str:
+        return val.translate(str.maketrans({'\'': '\\\'',
+                                            '\\': '\\\\'}))
+
     def visit_StringNode(self, node: mparser.StringNode) -> None:
         assert isinstance(node.value, str)
-        self.append("'" + node.value + "'", node)
+        self.append("'" + self.escape(node.value) + "'", node)
         node.lineno = self.curr_line or node.lineno
 
     def visit_FormatStringNode(self, node: mparser.FormatStringNode) -> None: