Background

Three days ago, I made a change in my VIMRC on *nix due to Vundle’s interface change a year ago.¹²

With the following Vim editor command, the replacement was done quickly.

:%s/\(Plugin \)\@<="\([^"]*\)"/'\2'/

Problem

I got some errors when I opened Vim again.

Error detected while processing /home/owner/.vimrc:
line   38:
E471: Argument required: Plugin 
line   39:
E471: Argument required: Plugin 
line   40:
E471: Argument required: Plugin 
line   42:
E471: Argument required: Plugin 
line   45:
E471: Argument required: Plugin 
line   46:
E471: Argument required: Plugin 
line   47:
E471: Argument required: Plugin 
line   48:
E471: Argument required: Plugin 
Press ENTER or type command to continue

Discussion

The number of errors I had received was less than that of the plugins I had installed. Therefore, it was reasonable for me to conclude that the lines in my VIMRC for some plugin were still correct.

Solution

After I had saved the console error output into a text file, I opened my VIMRC with Vim, so that I could use 38G to jump to the first erroneous line. Above that line, I also had some lines starting with Plugin. I compared their differences, and jumped to other erroneous lines as well. I finally discovered that one should never use a double quote for indicating the name of the plugin — use single quote only.

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