Fix lua lint errors, move mac installation of luarocks

.github/workflows/lua.yml

@@ -50,7 +50,11 @@ jobs:
       with:
         withLuaPath: "lua"
 
+    - run: sudo luarocks install luacov
+      if: ${{ !contains(matrix.os, 'windows') }}
+
     - run: luarocks install luacov
+      if: ${{ contains(matrix.os, 'windows') }}
 
     - run: make lu_test COV=true
 

lua/src/p0001.lua

@@ -19,17 +19,17 @@ return {
         local answer = 0
 
         for i = 3,999,3
-        do 
+        do
             answer = answer + i
         end
 
         for i = 5,999,5
-        do 
+        do
             answer = answer + i
         end
 
         for i = 15,999,15
-        do 
+        do
             answer = answer - i
         end
 

lua/src/p0002.lua

@@ -21,8 +21,8 @@ return {
         while b < 4000000
         do
             answer = answer + b
-        
-            for j = 1,3,1
+
+            for _ = 1,3,1
             do
                 a, b = b, a + b
             end

lua/src/p0017.lua

@@ -83,7 +83,7 @@ return {
         local answer = 0
 
         for x = 1,1000,1
-        do 
+        do
             answer = answer + to_string_len(x)
         end