file.mkdir does not create intermediate directories any more

[ssaarinen]

Stumbled on this while upgrading an old build to newer grunt version. There is a plugin (grunt-ng-constant) that uses grunt.file.write and expects the intermediate directories to be created if they do not exist.

file.write still calls file.mkdir

grunt/lib/grunt/file.js

Line 271 in 238df78

file.mkdir(path.dirname(filepath));

which still states that it does this (like mkdir -p)

grunt/lib/grunt/file.js

Line 178 in 238df78

// Like mkdir -p. Create a directory and any intermediary directories.

But infact it does not and build fails (on 1.6.1) with
Warning: Unable to create directory "src/js" (Error code: EEXIST). if directory exists or ENOENT if it does not (and the hierarchy is more than 1 level, if i'm not not mistaken)

This works as expected w/ 1.5.3 (1.6.0 shows some syntax error)

API docs for file.write still state that

Write the specified contents to a file, creating intermediate directories if necessary.