Fix #25 Apply client edits correctly on the server
Fix #25 Apply client edits correctly on the server

Fix the code for substring analysis and concatenation on
'textDocument/didChange' requests so that the server's internal
representation of the document matches the client's.

Signed-off-by: Remy Suen <553f7e7fc51e9ff47ae89d5a0ebd06651241b998@gmail.com>

rcjsuen/dockerfile-language-server-nodejs,rcjsuen/dockerfile-language-server-nodejs