Add test case for issue 6714

Author: ytmimi

tests/source/issue_6714.rs

@@ -0,0 +1,36 @@
+// rustfmt-style_edition: 2027
+
+// The only difference between the two macros here is that one uses
+// `matches!('a', 'a'..='z' | '0'..='9')` while the other use
+// `matches!('a', 'a'..='z' | '0')`, without the second range. The problem is
+// that the first isn't formated by rustfmt.
+// You can test it yourself by using the Rustfmt tool, top right
+//
+// (Note that in this specific example, I could have used
+// `matches!('a', 'a'..='z') || matches!('a', '0'..='9')`, which *is* formated,
+// but that's not the point)
+
+macro_rules! this_macro_will_not_be_formated {
+    () => {
+
+let _      =
+"some ugly not formated code"
+;
+
+let _ = matches!('a', 'a'..='z' | '0'..='9');
+
+    };
+}
+
+macro_rules! this_macro_will_be_formated {
+    () => {
+
+let _      =
+"some ugly not formated code"
+;
+
+let _ = matches!('a', 'a'..='z' | '0');
+
+    };
+}
+

tests/target/issue_6714.rs

@@ -0,0 +1,27 @@
+// rustfmt-style_edition: 2027
+
+// The only difference between the two macros here is that one uses
+// `matches!('a', 'a'..='z' | '0'..='9')` while the other use
+// `matches!('a', 'a'..='z' | '0')`, without the second range. The problem is
+// that the first isn't formated by rustfmt.
+// You can test it yourself by using the Rustfmt tool, top right
+//
+// (Note that in this specific example, I could have used
+// `matches!('a', 'a'..='z') || matches!('a', '0'..='9')`, which *is* formated,
+// but that's not the point)
+
+macro_rules! this_macro_will_not_be_formated {
+    () => {
+        let _ = "some ugly not formated code";
+
+        let _ = matches!('a', 'a'..='z' | '0'..='9');
+    };
+}
+
+macro_rules! this_macro_will_be_formated {
+    () => {
+        let _ = "some ugly not formated code";
+
+        let _ = matches!('a', 'a'..='z' | '0');
+    };
+}