Configure clang-format

A .clang-format configuration template I prefer to use.

# .clang-format
# Run manually to reformat a file:
# clang-format -i --style=file <file>
# find . -iname '*.cc' -o -iname '*.h' -o -iname '*.h.in' | xargs clang-format -i --style=file

Language: Cpp
BasedOnStyle: Google
# The offset of Access specifier(public/protected/private)
AccessModifierOffset: -4
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
AllowShortLambdasOnASingleLine: false
ColumnLimit: 120
DerivePointerAlignment: false
IndentWidth: 4