Update unseparated_literal_suffix tests

Author: dswij

tests/ui-toml/separated_literal_suffix/clippy.toml

@@ -0,0 +1 @@
+literal-suffix-style = "separated"

tests/ui-toml/separated_literal_suffix/literal_suffix.rs

@@ -0,0 +1,6 @@
+#![warn(clippy::unseparated_literal_suffix)]
+
+fn main() {
+    let _ = 123i32; // warns
+    let _ = 123_i32;
+}

tests/ui-toml/separated_literal_suffix/literal_suffix.stderr

@@ -0,0 +1,10 @@
+error: integer type suffix should be separated by an underscore
+  --> $DIR/literal_suffix.rs:4:13
+   |
+LL |     let _ = 123i32; // warns
+   |             ^^^^^^ help: add an underscore: `123_i32`
+   |
+   = note: `-D clippy::unseparated-literal-suffix` implied by `-D warnings`
+
+error: aborting due to previous error
+

tests/ui-toml/unseparated_literal_suffix/clippy.toml

@@ -0,0 +1 @@
+literal-suffix-style = "unseparated"

tests/ui-toml/unseparated_literal_suffix/literal_suffix.rs

@@ -0,0 +1,6 @@
+#![warn(clippy::unseparated_literal_suffix)]
+
+fn main() {
+    let _ = 123i32;
+    let _ = 123_i32; // warns
+}

tests/ui-toml/unseparated_literal_suffix/literal_suffix.stderr

@@ -0,0 +1,10 @@
+error: integer type suffix should not be separated by an underscore
+  --> $DIR/literal_suffix.rs:5:13
+   |
+LL |     let _ = 123_i32; // warns
+   |             ^^^^^^^ help: remove the underscore: `123_`
+   |
+   = note: `-D clippy::unseparated-literal-suffix` implied by `-D warnings`
+
+error: aborting due to previous error
+