Updated incorrect docblock comment

Copy/paste from Squiz_Sniffs_Commenting_DocCommentAlignmentSniff
Fixed incorrect docblock comment
Merge pull request #186 from chrisbarr/patch-2

Incorrect docblock comment in Squiz_Sniffs_Scope_MethodScopeSniff
Merge pull request #185 from chrisbarr/patch-1

Incorrect docblock comment in Squiz_Sniffs_Files_FileExtensionSniff