fix completion

`triggerCharacter` is `nil` when typing letters and numbers

Author: sumneko

script/core/completion/completion.lua

@@ -1254,11 +1254,9 @@ local function tryWord(state, position, triggerCharacter, results)
             checkFunctionArgByDocParam(state, word, startPos, results)
         else
             local afterLocal = isAfterLocal(state, startPos)
-            if triggerCharacter ~= nil then
-                local stop = checkKeyWord(state, startPos, position, word, hasSpace, afterLocal, results)
-                if stop then
-                    return
-                end
+            local stop = checkKeyWord(state, startPos, position, word, hasSpace, afterLocal, results)
+            if stop then
+                return
             end
             if not hasSpace then
                 if afterLocal then

test/completion/common.lua

@@ -3074,3 +3074,8 @@ AAA = 1
 <??>
 ]]
 (EXISTS)
+
+TEST [[
+if<??>
+]]
+(EXISTS)

test/completion/init.lua

@@ -73,11 +73,16 @@ function TEST(script)
         local inputPos = catched['?'][1][2]
         if ContinueTyping then
             local triggerCharacter = script:sub(inputPos - 1, inputPos - 1)
+            if triggerCharacter == '\n'
+            or triggerCharacter:find '%w_' then
+                triggerCharacter = nil
+            end
             core.completion('', inputPos, triggerCharacter)
         end
         local offset = guide.positionToOffset(state, inputPos)
         local triggerCharacter = script:sub(offset, offset)
-        if triggerCharacter == '\n' then
+        if triggerCharacter == '\n'
+        or triggerCharacter:find '%w_' then
             triggerCharacter = nil
         end
         local result = core.completion('', inputPos, triggerCharacter)