Added rule about naming folders/directories

To close this issue
Avoid if/unless at the end of a non-trivial block

Using an `if` or `unless` modifier at the end of a non-trivial
multi-line block requires reading all the way to the end of the block
before the reader becomes aware that the block is guarded by a
condition.

Additionally, in the case where the code is being viewed as part of a
patch, the condition at the end of the block may not even be visible
in the diff context; this can make code reviews harder.
Remove redundant use of synonymus folder-directory
Merge pull request #312 from aspiers/patch-1

Avoid if/unless at the end of a non-trivial block
[Fix #314] Resolve a rule conflict
Merge pull request #303 from ShockwaveNN/patch-1

Added rule about naming folders/directories
Mention gittip
Fix typo
Merge pull request #316 from kimisaraz/fix-typo

Fix typo
Perfer next over conditional blocks
Fix while/until typo
Merge pull request #318 from wendelscardua/fix-typo

Fix while/until typo
Merge pull request #317 from geniou/next

Perfer next over conditional blocks
Added a few words to make the example more clear
Added a Russian translations into the tranlsations list.
Merge pull request #327 from arbox/fb_translations_list

Added a Russian translations into the tranlsations list.
Merge pull request #326 from LuqiPan/master

Added a few words to make the example more clear
Update a couple inconsistent commented outputs

Updates `#=>` to `# =>`.

Reasons why `# =>` is preferred:
- used in TRPL and pickaxe
- this guide itself recommends using one space after the leading `#`
Merge pull request #337 from bruno-/fix_commented_output

Update a couple inconsistent commented outputs
[Fix #319] Add anchors to rule bullets

This adds subtle and nonugly link markup to every bulleted rule for ease
of deeplinking.