twitter/bootstrap — pull request #7338 by hafeyang (2013-03-20 08:12:24+00:00)
Title: Maths is required to be in parenthesis in variables.less

according less1.4.0 (currently 1.4.0 Beta)Maths is required to be in parenthesis.

in variables.less

@inputHeight: @baseLineHeight + 10px;

in previous version of less will compiled to

@inputHeight: 30px;

but in version 1.4+ it will compiled to

@inputHeight : 20px +10px;

so I modified to

@inputHeight: (@baseLineHeight + 10px);