Correct syntax of example in [expr.prim.lambda]/2.
Correct syntax of example in [expr.req]/4.
Capitalize first word of a sentence in the second bullet of [expr.req]/6.
Fix subject-verb-agreement in [expr.req]/7.
Correct typos in [expr.req.simple]/1.
Correct inconsistent style in the example of [expr.req.type]/1.
Typo and missing word in [dcl.type.simple]/1.
Correct typos in the example of [dcl.decl]/4.
Merge pull request #26 from cartec/master

Mechanical fixes