Add Janet to languages.json (#1042)

README.md

@@ -424,6 +424,7 @@ Ini
 IntelHex
 Isabelle
 Jai
+Janet
 Java
 JavaScript
 Jq

languages.json

@@ -719,6 +719,11 @@
       "extensions": ["jai"],
       "nested": true
     },
+    "Janet": {
+      "line_comment": ["#"],
+      "quotes": [["\\\"", "\\\""], ["'", "'"], ["`", "`"]],
+      "extensions": ["janet"]
+    },
     "Java": {
       "line_comment": ["//"],
       "multi_line_comments": [["/*", "*/"]],

tests/data/janet.janet

@@ -0,0 +1,17 @@
+# 17 lines 12 code 3 comments 2 blanks
+
+# Below is a function
+(defn a-fn
+  "Docstring with a hash #"
+  [a b]
+  (+ 1 1))
+
+(defn a-fn2
+  #"Not a doc"
+  "String"
+  [a b] # a and b right?
+  (let [multiline "I'm
+  a multline
+  # string
+  "]
+       (str multline a b)))