update elements and fix some bugs

lib/src/prism/components/prism-makefile.js

Index: lib/src/prism/components/prism-makefile.js
diff --git a/lib/src/prism/components/prism-makefile.js b/lib/src/prism/components/prism-makefile.js
index a678fabac83863effa1f647a5a250ab519b93494..a2b47a46ebf68604938e86df02e5365bf62fa254 100644
--- a/lib/src/prism/components/prism-makefile.js
+++ b/lib/src/prism/components/prism-makefile.js
@@ -1,9 +1,9 @@
 Prism.languages.makefile = {
 	'comment': {
-		pattern: /(^|[^\\])#(?:\\[\s\S]|.)*/,
+		pattern: /(^|[^\\])#(?:\\(?:\r\n|[\s\S])|.)*/,
 		lookbehind: true
 	},
-	'string': /(["'])(?:\\[\s\S]|(?!\1)[^\\\r\n])*\1/,
+	'string': /(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
 
 	// Built-in target names
 	'builtin': /\.[A-Z][^:#=\s]+(?=\s*:(?!=))/,
@@ -19,7 +19,7 @@ Prism.languages.makefile = {
 
 	'keyword': [
 		// Directives
-		/\b(?:define|else|endef|endif|export|ifn?def|ifn?eq|-?include|override|private|sinclude|undefine|unexport|vpath)\b/,
+		/-include\b|\b(?:define|else|endef|endif|export|ifn?def|ifn?eq|include|override|private|sinclude|undefine|unexport|vpath)\b/,
 		// Functions
 		{
 			pattern: /(\()(?:addsuffix|abspath|and|basename|call|dir|error|eval|file|filter(?:-out)?|findstring|firstword|flavor|foreach|guile|if|info|join|lastword|load|notdir|or|origin|patsubst|realpath|shell|sort|strip|subst|suffix|value|warning|wildcard|word(?:s|list)?)(?=[ \t])/,