Add LTeX for grammar checking

bin/util/check_grammar.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# Run LTeX grammar checker: https://valentjn.github.io/ltex/index.html
+
+ltex=~/bin/ltex-ls-15.2.0/bin/ltex-cli
+config=$(dirname "$0")/ltex_config.json
+temp=$(mktemp /tmp/ltex_XXXXXXXX.md)
+
+# Image links seems to cause a problem for LTeX, so strip them
+cat $1 | sed 's/^!\[.*$//' > $temp
+
+$ltex --client-configuration=$config $temp | sed "s:^$temp:\n$1:"
+
+rm -f $temp

bin/util/ltex_config.json

@@ -0,0 +1,23 @@
+{
+  "language": "en-GB",
+  "disabledRules": {
+    "en-GB": [
+      "MORFOLOGIK_RULE_EN_GB",
+      "OXFORD_SPELLING_Z_NOT_S",
+      "ARROWS",
+      "WHITESPACE_RULE",
+      "WANNA",
+      "EN_WORD_COHERENCY",
+      "SOME_OF_THE",
+      "SMALL_NUMBER_OF"
+    ]
+  },
+  "markdown": {
+    "nodes": {}
+  },
+  "hiddenFalsePositives": {
+    "en-GB": [
+      "{\"rule\": \"EN_COMPOUNDS\", \"sentence\": \"block chain\"}"
+    ]
+  }
+}