clang-format: Override ColumnLimit option on file by file bases.

[dehinrsu]

It is hard to get the correct ColumnLimit value which best suits all the files in the project.

Along with the global ColumnLimit option (which applies for the entire project), a pragma for a local and custom ColumnLimit (which applies to that file only) will be useful.

// clang-format ColumnLimit 150
or
// clang-format ColumnLimitLocal 150
or
// clang-format ColumnLimitFile 150

[mydeveloperday]

What is the value of this? I think it would too much complexity to the code