fix(lua): update escape and adjust coloring

- Numbers and escapes: magenta

lua.nanorc

@@ -53,9 +53,9 @@ color brightmagenta "\<(false|nil|true)\>"
 color brightgreen "(\<(dofile|require|include)|%q|%!|%Q|%r|%x)\>"
 
 # Numbers (hex and decimal with scientific notation)
-#color red "\<(0[xX](([0-9A-Fa-f]+\.[0-9A-Fa-f]*)|(\.?[0-9A-Fa-f]+))([pP][-+]?[0-9]+)?)\>"
-#color red "\<((([0-9]+\.[0-9]*)|(\.?[0-9]+))([eE][-+]?[0-9]+)?)\>"
-color red "\<((0[xX](([0-9A-Fa-f]+\.[0-9A-Fa-f]*)|(\.?[0-9A-Fa-f]+))([pP][-+]?[0-9]+)?)|((([0-9]+\.[0-9]*)|(\.?[0-9]+))([eE][-+]?[0-9]+)?))\>"
+#color magenta "\<(0[xX](([0-9A-Fa-f]+\.[0-9A-Fa-f]*)|(\.?[0-9A-Fa-f]+))([pP][-+]?[0-9]+)?)\>"
+#color magenta "\<((([0-9]+\.[0-9]*)|(\.?[0-9]+))([eE][-+]?[0-9]+)?)\>"
+color magenta "\<((0[xX](([0-9A-Fa-f]+\.[0-9A-Fa-f]*)|(\.?[0-9A-Fa-f]+))([pP][-+]?[0-9]+)?)|((([0-9]+\.[0-9]*)|(\.?[0-9]+))([eE][-+]?[0-9]+)?))\>"
 
 # Symbols
 color brightmagenta "(\(|\)|\[|\]|\{|\})"
@@ -67,7 +67,7 @@ color red "\"(\\.|[^\\\"])*\"|'(\\.|[^\\'])*'"
 color red start="\s*\[\[" end="\]\]"
 
 # Escapes
-#color red "\\[0-7][0-7][0-7]|\\x[0-9a-fA-F][0-9a-fA-F]|\\[abefnrs]|(\\c|\\C-|\\M-|\\M-\\C-)."
+color magenta "\\([abfnrtvz'\"]|[0-9]{1,3}|x[0-9a-fA-F][0-9a-fA-F]|u\{[0-9a-fA-F]+\})"
 
 # Shebang
 color brightcyan "^#!.*"