fix(vim-patch.sh): run nvim with -u NONE -n #16179

Problem:
Because of -u NORC, vim-patch.sh would hang on my machine due to one of my
plugins (start package) waiting for prompt input.

Solution:
- Use -u NONE instead to disable all plugins.
- Also use -n to disable swapfiles. These changes only apply to the --headless
  nvim instances used to process things.

scripts/vim-patch.sh

@@ -183,7 +183,7 @@ assign_commit_details() {
 # Patch surgery
 preprocess_patch() {
   local file="$1"
-  local nvim="nvim -u NORC -i NONE --headless"
+  local nvim="nvim -u NONE -n -i NONE --headless"
 
   # Remove Filelist, README
   local na_files='Filelist\|README.*'
@@ -683,7 +683,7 @@ review_commit() {
     exit 1
   fi
 
-  assign_commit_details "${vim_version}"
+  assign_commit_details "${vim_version}"
 
   echo
   echo "Creating files."