[llvm-bugs] [Bug 36766] New: Namespaces with one function declaration get formatted incorrectly

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36766

            Bug ID: 36766
           Summary: Namespaces with one function declaration get formatted
                    incorrectly
           Product: clang
           Version: 6.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Formatter
          Assignee: unassignedclangbugs at nondot.org
          Reporter: artemiev.mikhail at gmail.com
                CC: djasper at google.com, klimek at google.com,
                    llvm-bugs at lists.llvm.org

Let's consider this example:

$ cat test.cpp
namespace Foo1 { // contains a single function declaration

void a();

}
namespace Foo2 { // contains multiple function declarations

void a();
void b();

}
namespace Bar { // contains a single function definition

void b() {}

}
namespace Baz { // contains mixed definitions/declarations

void b() {}
void a();

}

clang-format formats incorrectly the first namespace:
$ clang-format --style=llvm ~/main6.cpp
namespace Foo1 { // contains a single function declaration

void a();
}
namespace Foo2 { // contains multiple function declarations

void a();
void b();

} // namespace Foo2
namespace Bar { // contains a single function definition

void b() {}

} // namespace Bar
namespace Baz { // contains mixed definitions/declarations

void b() {}
void a();

} // namespace Baz

clang-format removes a blank line before the closing brace and it doesn't fix
the namespace comment.

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