Reverted changes in colors.{cc,h}

`static x(const std::string& input)` caused errors, so it had to be
reverted.

src/colors.cc

@@ -1,107 +1,107 @@
 #include "colors.h"
 
-static std::string black(const std::string& input) {
+std::string black(std::string input) {
     return "\x1b[30m" + input + "\x1b[0m";
 }
-static std::string red(const std::string& input) {
+std::string red(std::string input) {
     return "\x1b[31m" + input + "\x1b[0m";
 }
-static std::string green(const std::string& input) {
+std::string green(std::string input) {
     return "\x1b[32m" + input + "\x1b[0m";
 }
-static std::string yellow(const std::string& input) {
+std::string yellow(std::string input) {
     return "\x1b[33m" + input + "\x1b[0m";
 }
-static std::string blue(const std::string& input) {
+std::string blue(std::string input) {
     return "\x1b[34m" + input + "\x1b[0m";
 }
-static std::string magenta(const std::string& input) {
+std::string magenta(std::string input) {
     return "\x1b[35m" + input + "\x1b[0m";
 }
-static std::string cyan(const std::string& input) {
+std::string cyan(std::string input) {
     return "\x1b[36m" + input + "\x1b[0m";
 }
-static std::string white(const std::string& input) {
+std::string white(std::string input) {
     return "\x1b[37m" + input + "\x1b[0m";
 }
-static std::string bright_black(const std::string& input) {
+std::string bright_black(std::string input) {
     return "\x1b[90m" + input + "\x1b[0m";
 }
-static std::string bright_red(const std::string& input) {
+std::string bright_red(std::string input) {
     return "\x1b[91m" + input + "\x1b[0m";
 }
-static std::string bright_green(const std::string& input) {
+std::string bright_green(std::string input) {
     return "\x1b[92m" + input + "\x1b[0m";
 }
-static std::string bright_yellow(const std::string& input) {
+std::string bright_yellow(std::string input) {
     return "\x1b[93m" + input + "\x1b[0m";
 }
-static std::string bright_blue(const std::string& input) {
+std::string bright_blue(std::string input) {
     return "\x1b[94m" + input + "\x1b[0m";
 }
-static std::string bright_magenta(const std::string& input) {
+std::string bright_magenta(std::string input) {
     return "\x1b[95m" + input + "\x1b[0m";
 }
-static std::string bright_cyan(const std::string& input) {
+std::string bright_cyan(std::string input) {
     return "\x1b[96m" + input + "\x1b[0m";
 }
-static std::string bright_white(const std::string& input) {
+std::string bright_white(std::string input) {
     return "\x1b[97m" + input + "\x1b[0m";
 }
-static std::string bg_black(const std::string& input) {
+std::string bg_black(std::string input) {
     return "\x1b[40m" + input + "\x1b[0m";
 }
-static std::string bg_red(const std::string& input) {
+std::string bg_red(std::string input) {
     return "\x1b[41m" + input + "\x1b[0m";
 }
-static std::string bg_green(const std::string& input) {
+std::string bg_green(std::string input) {
     return "\x1b[42m" + input + "\x1b[0m";
 }
-static std::string bg_yellow(const std::string& input) {
+std::string bg_yellow(std::string input) {
     return "\x1b[43m" + input + "\x1b[0m";
 }
-static std::string bg_blue(const std::string& input) {
+std::string bg_blue(std::string input) {
     return "\x1b[44m" + input + "\x1b[0m";
 }
-static std::string bg_magenta(const std::string& input) {
+std::string bg_magenta(std::string input) {
     return "\x1b[45m" + input + "\x1b[0m";
 }
-static std::string bg_cyan(const std::string& input) {
+std::string bg_cyan(std::string input) {
     return "\x1b[46m" + input + "\x1b[0m";
 }
-static std::string bg_white(const std::string& input) {
+std::string bg_white(std::string input) {
     return "\x1b[47m" + input + "\x1b[0m";
 }
-static std::string bg_bright_black(const std::string& input) {
+std::string bg_bright_black(std::string input) {
     return "\x1b[100m" + input + "\x1b[0m";
 }
-static std::string bg_bright_red(const std::string& input) {
+std::string bg_bright_red(std::string input) {
     return "\x1b[101m" + input + "\x1b[0m";
 }
-static std::string bg_bright_green(const std::string& input) {
+std::string bg_bright_green(std::string input) {
     return "\x1b[102m" + input + "\x1b[0m";
 }
-static std::string bg_bright_yellow(const std::string& input) {
+std::string bg_bright_yellow(std::string input) {
     return "\x1b[103m" + input + "\x1b[0m";
 }
-static std::string bg_bright_blue(const std::string& input) {
+std::string bg_bright_blue(std::string input) {
     return "\x1b[104m" + input + "\x1b[0m";
 }
-static std::string bg_bright_magenta(const std::string& input) {
+std::string bg_bright_magenta(std::string input) {
     return "\x1b[105m" + input + "\x1b[0m";
 }
-static std::string bg_bright_cyan(const std::string& input) {
+std::string bg_bright_cyan(std::string input) {
     return "\x1b[106m" + input + "\x1b[0m";
 }
-static std::string bg_bright_white(const std::string& input) {
+std::string bg_bright_white(std::string input) {
     return "\x1b[107m" + input + "\x1b[0m";
 }
-static std::string bold(const std::string& input) {
+std::string bold(std::string input) {
     return "\x1b[1m" + input + "\x1b[0m";
 }
-static std::string underline(const std::string& input) {
+std::string underline(std::string input) {
     return "\x1b[4m" + input + "\x1b[0m";
 }
-static std::string reverse(const std::string& input) {
+std::string reverse(std::string input) {
     return "\x1b[7m" + input + "\x1b[0m";
 }

src/colors.h

@@ -2,38 +2,38 @@
 
 #include <string>
 
-static std::string black(const std::string& input);
-static std::string red(const std::string& input);
-static std::string green(const std::string& input);
-static std::string yellow(const std::string& input);
-static std::string blue(const std::string& input);
-static std::string magenta(const std::string& input);
-static std::string cyan(const std::string& input);
-static std::string white(const std::string& input);
-static std::string bright_black(const std::string& input);
-static std::string bright_red(const std::string& input);
-static std::string bright_green(const std::string& input);
-static std::string bright_yellow(const std::string& input);
-static std::string bright_blue(const std::string& input);
-static std::string bright_magenta(const std::string& input);
-static std::string bright_cyan(const std::string& input);
-static std::string bright_white(const std::string& input);
-static std::string bg_black(const std::string& input);
-static std::string bg_red(const std::string& input);
-static std::string bg_green(const std::string& input);
-static std::string bg_yellow(const std::string& input);
-static std::string bg_blue(const std::string& input);
-static std::string bg_magenta(const std::string& input);
-static std::string bg_cyan(const std::string& input);
-static std::string bg_white(const std::string& input);
-static std::string bg_bright_black(const std::string& input);
-static std::string bg_bright_red(const std::string& input);
-static std::string bg_bright_green(const std::string& input);
-static std::string bg_bright_yellow(const std::string& input);
-static std::string bg_bright_blue(const std::string& input);
-static std::string bg_bright_magenta(const std::string& input);
-static std::string bg_bright_cyan(const std::string& input);
-static std::string bg_bright_white(const std::string& input);
-static std::string bold(const std::string&& input);
-static std::string underline(const std::string& input);
-static std::string reverse(const std::string& input);
+std::string black(std::string input);
+std::string red(std::string input);
+std::string green(std::string input);
+std::string yellow(std::string input);
+std::string blue(std::string input);
+std::string magenta(std::string input);
+std::string cyan(std::string input);
+std::string white(std::string input);
+std::string bright_black(std::string input);
+std::string bright_red(std::string input);
+std::string bright_green(std::string input);
+std::string bright_yellow(std::string input);
+std::string bright_blue(std::string input);
+std::string bright_magenta(std::string input);
+std::string bright_cyan(std::string input);
+std::string bright_white(std::string input);
+std::string bg_black(std::string input);
+std::string bg_red(std::string input);
+std::string bg_green(std::string input);
+std::string bg_yellow(std::string input);
+std::string bg_blue(std::string input);
+std::string bg_magenta(std::string input);
+std::string bg_cyan(std::string input);
+std::string bg_white(std::string input);
+std::string bg_bright_black(std::string input);
+std::string bg_bright_red(std::string input);
+std::string bg_bright_green(std::string input);
+std::string bg_bright_yellow(std::string input);
+std::string bg_bright_blue(std::string input);
+std::string bg_bright_magenta(std::string input);
+std::string bg_bright_cyan(std::string input);
+std::string bg_bright_white(std::string input);
+std::string bold(std::string input);
+std::string underline(std::string input);
+std::string reverse(std::string input);