Fix #490

src/dfmt/formatter.d

@@ -9,8 +9,9 @@ module dfmt.formatter;
 import dparse.lexer;
 import dparse.parser;
 import dparse.rollback_allocator;
-import dfmt.config;
 import dfmt.ast_info;
+import dfmt.config;
+import dfmt.editorconfig : OptionalBoolean;
 import dfmt.indentation;
 import dfmt.tokens;
 import dfmt.wrapping;
@@ -477,7 +478,8 @@ private:
         immutable j = justAddedExtraNewline;
         if (currIsSlashSlash)
         {
-            newline();
+            if (config.dfmt_keep_line_breaks != OptionalBoolean.t)
+                newline();
             justAddedExtraNewline = j;
         }
         else if (hasCurrent)
@@ -584,8 +586,6 @@ private:
     }
     do
     {
-        import dfmt.editorconfig : OptionalBoolean;
-
         immutable p = current.type;
         regenLineBreakHintsIfNecessary(index);
         writeToken();

tests/allman/issue0490.d.ref

@@ -0,0 +1,6 @@
+void foo()
+{
+    afdsafds
+        .asdf // blah
+        .flub;
+}

tests/issue0490.args

@@ -0,0 +1 @@
+--keep_line_breaks=true

tests/issue0490.d

@@ -0,0 +1,6 @@
+void foo()
+{
+    afdsafds
+        .asdf // blah
+        .flub;
+}

tests/otbs/issue0490.d.ref

@@ -0,0 +1,5 @@
+void foo() {
+    afdsafds
+        .asdf // blah
+        .flub;
+}