format_visitor.h:14:  private: should be indented +1 space inside class FormatVisitor  [whitespace/indent] [3]
format_visitor.h:26:  Is this a non-const reference? If so, make const or use a pointer: string& param2  [runtime/references] [2]
format_visitor.h:32:  public: should be indented +1 space inside class FormatVisitor  [whitespace/indent] [3]
format_visitor.h:39:  Line ends in whitespace.  Consider deleting these extra spaces.  [whitespace/end_of_line] [4]
format_visitor.h:62:  Line ends in whitespace.  Consider deleting these extra spaces.  [whitespace/end_of_line] [4]
format_visitor.h:77:  Line ends in whitespace.  Consider deleting these extra spaces.  [whitespace/end_of_line] [4]
format_visitor.h:89:  Redundant blank line at the end of a code block should be deleted.  [whitespace/blank_line] [3]
format_visitor.h:85:  Add #include <utility> for move  [build/include_what_you_use] [4]
Done processing format_visitor.h
Total errors found: 8