Merge pull request #8402 from senny/8376_descriptive_error_message_for_partial_layout_true

More descriptive error when rendering a partial with `:layout => true`
Add shallow nesting to the routing guide
List instructions in the order to be executed
Capitalize all table column titles in routing guide
match text with translation file example
Use correct conjunction and connector words [ci skip]
Move note to a meaningful section in the guides [ci skip]
Clarify section titles [ci skip]
Show equivalent routes definition without using concerns [ci skip]
Normalize use of colon before code examples in routing guide [ci skip]
Convert a section to a tip to highlight it [ci skip]
Correct grammar [ci skip]
Add clarity to static segments docs in non-resourceful routes [ci skip]
Convert parragraph about security to a NOTE [ci skip]
Add counterexample for regex [ci skip]
Standardize use of "route globbing" and "wildcard segments" [ci skip]
removed an extra slash before the 'app' dir
added full file path in all file references

It's really comfy being able to copy-paste the file paths.

I suppose there's also some benefit in trying to figure out the file name as a small exercise, but I don't think that sort of thing belongs in "Getting Started".
increment_counter and decrement_counter can accept and array of ids as an arg
grammar improvements for increment_counter and decrement_counter docs