Cache syntax highlighting rules

runtime/syntax/arduino.micro

@@ -95,7 +95,7 @@ color brightyellow "\b(setup|loop)\b"
 color brightcyan "^[[:space:]]*#[[:space:]]*(define|include(_next)?|(un|ifn?)def|endif|el(if|se)|if|warning|error|pragma)"
 
 ## 
-color brightmagenta "'([^'\]|(\\["'abfnrtv\\]))'" "'\\(([0-3]?[0-7]{1,2}))'" "'\\x[0-9A-Fa-f]{1,2}'"
+color brightmagenta "'([^'\\]|(\\["'abfnrtv\\]))'" "'\\(([0-3]?[0-7]{1,2}))'" "'\\x[0-9A-Fa-f]{1,2}'"
 
 ## GCC builtins
 color cyan "__attribute__[[:space:]]*\(\([^)]*\)\)" "__(aligned|asm|builtin|hidden|inline|packed|restrict|section|typeof|weak)__"

runtime/syntax/awk.micro

@@ -16,7 +16,7 @@ color brightblue "\b(split|sprintf|strtonum|sub|substr|tolower|toupper)\b"
 color brightblue "\b(mktime|strftime|systime)\b"
 color brightblue "\b(and|compl|lshift|or|rshift|xor)\b"
 color brightblue "\b(bindtextdomain|dcgettext|dcngettext)\b"
-color magenta   "/.*[^\]/"
+color magenta   "/.*[^\\]/"
 color yellow ""(\\.|[^"])*"|'(\\.|[^'])*'"
 color magenta   "\\."
 color brightblack "(^|[[:space:]])#([^{].*)?$"

runtime/syntax/c.micro

@@ -9,7 +9,7 @@ color statement "\b(for|if|while|do|else|case|default|switch)\b"
 color statement "\b(try|throw|catch|operator|new|delete)\b"
 color statement "\b(goto|continue|break|return)\b"
 color preproc "^[[:space:]]*#[[:space:]]*(define|include|(un|ifn?)def|endif|el(if|se)|if|warning|error)"
-color brightmagenta "'([^'\]|(\\["'abfnrtv\\]))'" "'\\(([0-3]?[0-7]{1,2}))'" "'\\x[0-9A-Fa-f]{1,2}'"
+color constant "'([^'\\]|(\\["'abfnrtv\\]))'" "'\\(([0-3]?[0-7]{1,2}))'" "'\\x[0-9A-Fa-f]{1,2}'"
 
 ##
 ## GCC builtins

runtime/syntax/d.micro

@@ -77,7 +77,7 @@ color constant "q"\{.*\}""
 color constant "q"\[.*\]""
 color constant "q"<.*>""
 color constant (s) "q"[^({[<"][^"]*$.*?^[^"]+""
-color constant "q"([^({[<"]).*\1""
+color constant "q"([^({[<"]).*""
 
 ### TokenString
 ### True token strings require nesting, so, again, they can't be implemented accurately here.