I figured it out. I cloned the SD card from my new IoTaWatt (nice case modification) and compared the files. It turns out that when I copied the raw files from Github I was presented with an option to translate to English from Maltese
Like a true 'merican and blind truster of all things Google and Windows I chose the native language… Grrrrrr! It adds a space before and after all = characters.
No wonder all .htm files weren’t working properly, i.e. Edit, Graph, Graph2, etc.
Thanks for all of your time yesterday. Hopefully this will save others the wasted time.