Rust: accept test changes

Author: Paolo Tranquilli

rust/ql/test/extractor-tests/generated/FormatArgsExpr/FormatArgsExpr_getTemplate.expected

@@ -3,5 +3,5 @@
 | gen_format_args_expr.rs:6:17:6:37 | FormatArgsExpr | gen_format_args_expr.rs:6:18:6:30 | "{} foo {:?}" |
 | gen_format_args_expr.rs:7:17:7:43 | FormatArgsExpr | gen_format_args_expr.rs:7:18:7:32 | "{b} foo {a:?}" |
 | gen_format_args_expr.rs:9:17:9:28 | FormatArgsExpr | gen_format_args_expr.rs:9:18:9:27 | "{x}, {y}" |
-| gen_format_argument.rs:5:14:5:47 | FormatArgsExpr | gen_format_argument.rs:5:14:5:47 | "Value {value:#width$.precision$}\\n" |
+| gen_format_argument.rs:5:14:5:47 | FormatArgsExpr | gen_format_argument.rs:5:14:5:47 | "Value {value:#width$.precisio... |
 | gen_format_argument.rs:7:14:7:56 | FormatArgsExpr | gen_format_argument.rs:7:14:7:31 | "Value {0:#1$.2$}\\n" |