Make Tab-Completion usable in WSL by removing Windows stuff from PATH

.bashrc

# If in WSL, remove all windows stuff from path, except Windows dir for explorer.exe
# This Speeds up Tab-completion A LOT. without this pressing TAB takes ~8.5 seconds, with this
# ~100ms. Change /mnt/\c\/ to something different if the Windows drive is mounted somewhere else...
C_DRIVE='/mnt/c'
if [ -d "$C_DRIVE" ]; then
  export PATH=$(echo ${PATH} | \
    awk -v RS=: -v ORS=: "/${C_DRIVE//\//\\/}/ {next} {print}" | sed 's/:*$//')
  # Add C:\Windows back so you can do `explorer.exe .` to open an explorer at current directory
  export PATH="$PATH:$C_DRIVE/Windows/"
fi