Update maximum-line-length.js

Adding a space in the error message. Currently it returns strings such as:

> Line must be at most 100characters at routes/account.js :

But [I think] it reads a bit better if we say "at most 100 characters"
Fix in error message for rule `maximumLineLength` (@pdehaan)
1.2.1
Fixed case with number for `requireDotNotation` rule
Prepare for version 1.2.2
1.2.2
Add EditorConfig file and normalized spacing
Add Konstantin Ikonnikov's email to package.json
Fix jsdoc in token-helper.js
Some minor fixes to the Contribute.md
Add inline reporter
Remove line break
requireDonNotation: better reserved words support
requireDonNotation: ignore 'null', 'true', 'false' strings for es3
requireDotNotation should ignore invalid identifier name (close #158)
Simplify identifier regexp, rename utils.isIdentifierName() -> utils.isValidIdentifierName()
Prepare for 1.2.3
1.2.3
errors.js: fix typo in comment
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