Fix #707 - Fix some duplicate tags, and add some code to check for them

doc/ale-javascript.txt

@@ -119,12 +119,12 @@ g:ale_javascript_prettier_eslint_use_global
 
 
 -------------------------------------------------------------------------------
-prettier-standard                              *ale-javascript-prettier-eslint*
+prettier-standard                            *ale-javascript-prettier-standard*
 
 
 g:ale_javascript_prettier_standard_executable
-                                  *g:ale_javascript_prettier_eslint_executable*
-                                  *b:ale_javascript_prettier_eslint_executable*
+                                *g:ale_javascript_prettier_standard_executable*
+                                *b:ale_javascript_prettier_standard_executable*
   Type: |String|
   Default: `'prettier-standard'`
 

run-tests

@@ -194,6 +194,14 @@ if ((run_custom_checks)); then
     docker run -a stdout "${DOCKER_FLAGS[@]}" ./custom-checks . || EXIT=$?
     set +o pipefail
     echo
+
+    echo '========================================'
+    echo 'Checking for duplicate tags'
+    echo '========================================'
+    echo 'Duplicate tags follow:'
+    echo
+
+    grep --exclude=tags -roh '\*.*\*$' doc | sort | uniq -d || EXIT=$?
 fi
 
 exit $EXIT