Cleanup for the rest of SPM

* Install method needs to be cleaned up significantly, far too much mutation in that method

src/spm/spm.lua

@@ -493,8 +493,8 @@ local function uninstallPackage(requestedPackage)
     end
 
     term.write("Removing package files...")
-    for i, j in pairs(locallyInstalledFiles[requestedPackage]) do
-        fs.remove(j)
+    for installedFilePath, fileLocalInstallPath in pairs(locallyInstalledFiles[requestedPackage]) do
+        fs.remove(fileLocalInstallPath)
     end
 
     term.write("Done\nRemoving references...")
@@ -504,19 +504,19 @@ local function uninstallPackage(requestedPackage)
     print("Successfully uninstalled package " .. requestedPackage)
 end
 
-local function updatePackage(pack)
-    if pack == "all" then
+local function updatePackage(requestedPackage)
+    if requestedPackage == "all" then
         print("Updating everything...")
-        local tFiles = readFromLocalInstallFile()
-        if not tFiles then
+        local locallyInstalledPackages = readFromLocalInstallFile()
+        if not locallyInstalledPackages then
             io.stderr:write("Error while trying to read package names")
             return
-        elseif tFiles[1] == -1 then
-            table.remove(tFiles, 1)
+        elseif locallyInstalledPackages[1] == -1 then
+            table.remove(locallyInstalledPackages, 1)
         end
         local done = false
-        for i in pairs(tFiles) do
-            installPackage(i, nil, true)
+        for localPackage in pairs(locallyInstalledPackages) do
+            installPackage(localPackage, nil, true)
             done = true
         end
         if not done then