Source code for example from issue rust-lang#6202

Target code from example issue rust-lang#6202

Corrected indentation and use of spacing for resriting let statements

Modified resrite_let to account for trailing ' ='

Reduced configs down to what was necessary to reproduce issue

Reduced configs down to what was necessary to reproduce issue

Documented reason for modifying pat_shape to account for ' ='

Moved comment to match rest of codebase's style

Fixed issue with accounting for trailing ' =' in let statements

Removed trailing space

Fixed issue 6202

src/expr.rs

@@ -1860,7 +1860,11 @@ fn rewrite_let(
     // TODO(ytmimi) comments could appear between `let` and the `pat`
 
     // 4 = "let ".len()
-    let pat_shape = shape.offset_left(4)?;
+    let mut pat_shape = shape.offset_left(4)?;
+    if context.config.version() == Version::Two {
+        // 2 to account for the length of " ="
+        pat_shape = pat_shape.sub_width(2)?;
+    }
     let pat_str = pat.rewrite(context, pat_shape)?;
     result.push_str(&pat_str);
 

tests/source/issue-6202/issue_example.rs

@@ -0,0 +1,13 @@
+// rustfmt-max_width: 120
+// rustfmt-version: Two
+
+impl EarlyLintPass for NeedlessContinue {
+    fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr) {
+        if let ExprKind::Loop(body, label, ..) | ExprKind::While(_, body, label) | ExprKind::ForLoop { body, label, .. } =  
+            &expr.kind
+            && !in_external_macro(cx.sess, expr.span)
+        {
+            check_final_block_stmt(cx, body, label, expr.span.ctxt());
+        }
+    }
+}

tests/target/issue-6202/issue_example.rs

@@ -0,0 +1,14 @@
+// rustfmt-max_width: 120
+// rustfmt-version: Two
+
+impl EarlyLintPass for NeedlessContinue {
+    fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr) {
+        if let ExprKind::Loop(body, label, ..)
+        | ExprKind::While(_, body, label)
+        | ExprKind::ForLoop { body, label, .. } = &expr.kind
+            && !in_external_macro(cx.sess, expr.span)
+        {
+            check_final_block_stmt(cx, body, label, expr.span.ctxt());
+        }
+    }
+}