Remove extra whitespace after match arrow

src/matches.rs

@@ -436,6 +436,9 @@ fn rewrite_match_body(
             };
 
         let block_sep = match context.config.control_brace_style() {
+            ControlBraceStyle::AlwaysNextLine if !context.config.match_arm_blocks() => {
+                format!("{}", body_prefix)
+            }
             ControlBraceStyle::AlwaysNextLine => format!("{}{}", alt_block_sep, body_prefix),
             _ if body_prefix.is_empty() => "".to_owned(),
             _ if forbid_same_line || !arrow_comment.is_empty() => {

tests/source/match_arm_blocks/false-always-next-line.rs

@@ -0,0 +1,13 @@
+// rustfmt-control_brace_style: AlwaysNextLine
+// rustfmt-match_arm_blocks: false
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo
+    {
+        "100000000000000000000000" =>
+
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/source/match_arm_blocks/false-always-same-line.rs

@@ -0,0 +1,12 @@
+// rustfmt-match_arm_blocks: false
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo
+    {
+        "100000000000000000000000" =>
+
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/source/match_arm_blocks/false-closing-next-line.rs

@@ -0,0 +1,13 @@
+// rustfmt-control_brace_style: ClosingNextLine
+// rustfmt-match_arm_blocks: false
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo
+    {
+        "100000000000000000000000" =>
+
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/source/match_arm_blocks/true-always-next-line.rs

@@ -0,0 +1,12 @@
+// rustfmt-control_brace_style: AlwaysNextLine
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo
+    {
+        "100000000000000000000000" =>
+
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/source/match_arm_blocks/true-always-same-line.rs

@@ -0,0 +1,10 @@
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo
+    {
+        "100000000000000000000000" =>
+
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/source/match_arm_blocks/true-closing-next-line.rs

@@ -0,0 +1,12 @@
+// rustfmt-control_brace_style: ClosingNextLine
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo
+    {
+        "100000000000000000000000" =>
+
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/target/match_arm_blocks/false-always-next-line.rs

@@ -0,0 +1,12 @@
+// rustfmt-control_brace_style: AlwaysNextLine
+// rustfmt-match_arm_blocks: false
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo
+    {
+        "100000000000000000000000" =>
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/target/match_arm_blocks/false-always-same-line.rs

@@ -0,0 +1,10 @@
+// rustfmt-match_arm_blocks: false
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo {
+        "100000000000000000000000" =>
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/target/match_arm_blocks/false-closing-next-line.rs

@@ -0,0 +1,11 @@
+// rustfmt-control_brace_style: ClosingNextLine
+// rustfmt-match_arm_blocks: false
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo {
+        "100000000000000000000000" =>
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222"),
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/target/match_arm_blocks/true-always-next-line.rs

@@ -0,0 +1,13 @@
+// rustfmt-control_brace_style: AlwaysNextLine
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo
+    {
+        "100000000000000000000000" =>
+        {
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222")
+        }
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/target/match_arm_blocks/true-always-same-line.rs

@@ -0,0 +1,9 @@
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo {
+        "100000000000000000000000" => {
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222")
+        }
+        _ => unreachable!("Should not happen"),
+    };
+}

tests/target/match_arm_blocks/true-closing-next-line.rs

@@ -0,0 +1,11 @@
+// rustfmt-control_brace_style: ClosingNextLine
+
+fn main() {
+    let fooooooo = "100000000000000000000000";
+    let _bar = match fooooooo {
+        "100000000000000000000000" => {
+            fooooooo.len() == 1 && fooooooo.contains("222222222222222222")
+        }
+        _ => unreachable!("Should not happen"),
+    };
+}