Add filetype mapping for txt to plaintext

This reduces the console output as everytime a txt file is loaded
a exception is printed out that no matching language mapping is found
for txt.

Signed-off-by: Ferdinand Thiessen <rpm@fthiessen.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/helpers/mappings.js b/src/helpers/mappings.js
index bbee0ac8c..b209495a2 100644
--- a/src/helpers/mappings.js
+++ b/src/helpers/mappings.js
@@ -89,6 +89,7 @@ const extensionHighlight = {
 	ml: 'ocaml',
 	rs: 'rust',
 	sci: 'scilab',
+	txt: 'plaintext',
 	vb: 'vbnet',
 	vbs: 'vbscript',
 }