[llvm-bugs] [Bug 38384] New: Incorrect formatting of long function arguments

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38384

            Bug ID: 38384
           Summary: Incorrect formatting of long function arguments
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Formatter
          Assignee: unassignedclangbugs at nondot.org
          Reporter: twesterhout at protonmail.com
                CC: djasper at google.com, klimek at google.com,
                    llvm-bugs at lists.llvm.org

The following piece of code is (I think) incorrectly formatted:
```
#define SOME_MACRO                                                            
\
    auto a_very_very_very_very_very_very_long_function_name(                  
\
        AndAType<WithSomeTemplates, AndSomeMoreTemplates> const a,            
\
        int                                                     b)
noexcept->int                                                   \
    {                                                                         
\
        return 123;                                                           
\
    }
```
I think the correct formatting would be something like this:
```
    auto a_very_very_very_very_very_very_long_function_name(                  
\
        AndAType<WithSomeTemplates, AndSomeMoreTemplates> const a,            
\
        int b) noexcept->int                                                  
\
```
Just removing the extra spaces before b aligns the backslashes which I think is
the intended behaviour.

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