ext2lang = {
    '.cpp': 'c++',
    '.c': 'c',
}

ext2lang = {
    '.c'  : 'c',
    '.cpp': 'c++',
    '.cc' : 'c++',
    '.cp' : 'c++',
    '.cxx': 'c++',
    '.CPP': 'c++',
    '.c++': 'c++',
    '.C'  : 'c++',
}

Support more C++ extensions by default
Support more C++ extensions by default

  ext2lang = {
+     '.c'  : 'c',
      '.cpp': 'c++',
-     '.c': 'c',
+     '.cc' : 'c++',
+     '.cp' : 'c++',
+     '.cxx': 'c++',
+     '.CPP': 'c++',
+     '.c++': 'c++',
+     '.C'  : 'c++',
  }
  
Support more C++ extensions by default
## Code Before:
ext2lang = {
    '.cpp': 'c++',
    '.c': 'c',
}

## Instruction:
Support more C++ extensions by default
## Code After:
ext2lang = {
    '.c'  : 'c',
    '.cpp': 'c++',
    '.cc' : 'c++',
    '.cp' : 'c++',
    '.cxx': 'c++',
    '.CPP': 'c++',
    '.c++': 'c++',
    '.C'  : 'c++',
}
